ACT English Quiz: Apostrophe Possessive And Plural
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Apostrophe Possessive And PluralQuestion 1 of 20

The teams strategy was to play aggressively.

NO CHANGE
teams's
teams'
team's
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ACT English Quiz

ACT English Quiz: Apostrophe Possessive And Plural

Practice Apostrophe Possessive And Plural in ACT English with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Apostrophe Possessive And Plural, giving you a quick way to practice the rules, question types, and explanations that matter most for ACT English.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

The teams strategy was to play aggressively.

  1. NO CHANGE
  2. teams's
  3. teams'
  4. team's (correct answer)

Explanation: This question tests possessive apostrophes. The strategy belongs to one team, and a singular noun shows possession by adding apostrophe plus s, so 'team's strategy' is correct. Leaving the original 'teams' gives a plural with no possessive marker at all, so it reads as more than one team and never shows ownership. The form 'teams'' is the possessive of the plural 'teams,' which would mean several teams shared one strategy, and 'teams's' stacks a plural and an apostrophe-s in a combination standard English does not use. Decide first how many owners there are, then apply the form: one owner takes apostrophe-s, a plural owner already ending in s takes just the apostrophe.

Question 2

In the museum's new exhibit, visitors can listen to recordings of poets reading their work. A sign near the entrance notes that the exhibits audio stations are cleaned hourly to keep the headphones sanitary. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. the exhibits audio stations are cleaned hourly
  3. the exhibits' audio stations are cleaned hourly
  4. the exhibit's audio stations are cleaned hourly (correct answer)

Explanation: The audio stations belong to one exhibit, so the noun in front of them must be a singular possessive: 'the exhibit's audio stations are cleaned hourly.' The rule to carry forward is that a singular owner takes an apostrophe before the s, while a plural owner takes the apostrophe after the s. The wordings that read 'the exhibits audio stations' contain no apostrophe at all, so 'exhibits' becomes an ordinary plural noun and the ownership disappears. The wording 'the exhibits' audio stations' does mark possession, but it makes the owner plural, which contradicts the sign describing one new exhibit. Decide how many owners there are first, then place the apostrophe: before the s for one, after the s for more than one.

Question 3

In the new apartment, two roommates agreed to split chores evenly and posted a chart on the fridge. To avoid confusion, they wrote down each roommates responsibilities for the week and initialed the tasks after finishing them. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. each roommates responsibilities for the week
  3. each roommates' responsibilities for the week
  4. each roommate's responsibilities for the week (correct answer)

Explanation: 'Each roommate' is singular, and the responsibilities belong to that individual roommate, so the sentence needs the singular possessive 'each roommate's responsibilities for the week.' The rule is that a singular owner takes an apostrophe before the s, while the form with the apostrophe after the s requires a plural owner. The wordings that read 'each roommates responsibilities' include no apostrophe at all, leaving 'roommates' as a plain plural noun with no ownership marked, and a plural noun cannot follow 'each' in the first place. 'Each roommates' responsibilities' does mark possession but assigns it to a plural owner, contradicting the singular sense of 'each.' Remember that words like each and every force the noun after them to be singular, so expect apostrophe plus s rather than s plus apostrophe.

Question 4

The childrens toys were scattered all over the floor.

  1. NO CHANGE
  2. childrens's
  3. childrens'
  4. children's (correct answer)

Explanation: This item tests possessive forms of irregular plural nouns. 'Children' is already the plural of 'child' and does not end in s, so possession is shown by adding an apostrophe plus s: 'children's toys.' Leaving the original 'childrens' has no apostrophe at all, so it shows no possession, and both 'childrens's' and 'childrens' build on the nonexistent word 'childrens.' Form the plural first, then punctuate: if the plural already ends in s, add just an apostrophe, and if it does not, add an apostrophe plus s.

Question 5

The birds nest was hidden in the tree.

  1. NO CHANGE
  2. birds'
  3. bird's (correct answer)
  4. bird

Explanation: Ownership requires an apostrophe, and its position depends on how many owners there are. One nest hidden in a tree belongs to a single bird, so the singular possessive 'bird's' is what the sentence needs before 'nest.' Leaving the original 'birds' is a plain plural with no apostrophe, so it shows no possession at all; 'birds'' is the possessive of several birds, which does not match one nest; and 'bird' drops the possessive marking entirely. Ask yourself whether the word is doing the owning: if it is, add the apostrophe, and let the number of owners decide whether the 's' comes before or after it.

Question 6

The city council reviewed proposals for a new bike lane, and several residents spoke during public comment. One speaker emphasized that the plan would reduce traffic near the elementary school. Another resident argued that it's safety benefits depend on clear signage, so the budget should include reflective paint. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. it's' safety benefits depend on clear signage
  3. its' safety benefits depend on clear signage
  4. its safety benefits depend on clear signage (correct answer)

Explanation: This question tests the difference between the possessive pronoun 'its' and the contraction 'it's.' The safety benefits belong to the plan, so the possessive with no apostrophe is required: 'its safety benefits depend on clear signage.' Keeping the original 'it's safety benefits depend on clear signage' substitutes the contraction for 'it is,' which would produce the nonsense 'it is safety benefits.' The versions written 'its'' and 'it's'' are not English words at all; no possessive pronoun ever takes an apostrophe. Test these by reading the underlined word as 'it is' out loud, and if that reading collapses, use 'its' with no apostrophe.

Question 7

PASSAGE II: The Invention of Velcro

¹ In 1941, a Swiss electrical engineer named George de Mestral went for a hunting trip in the Alps with his dog. Upon returning home, he noticed that his clothes and his (11) dog's fur, were covered in hundreds of tiny burrs from the burdock plant. Most people would have simply picked the burrs off and thrown them away. De Mestral, (12) consequently, was curious. He placed one of the burrs under a microscope to discover the secret to its incredible (13) stickiness.

² What he saw fascinated him. The outside of the burr was covered in hundreds of tiny, stiff hooks. These hooks perfectly latched onto the flexible, looped fibers of his clothing and his dog's hair. De Mestral immediately recognized the potential for a new type of fastener, (14) one, that could rival the zipper. He envisioned a two-sided material: one side featuring stiff hooks, and the other side featuring soft loops. When the two strips were pressed together, the hooks would catch the loops, creating a strong but reversible bond.

³ Turning this vision into a reality, (15) though, proved to be a daunting task. De Mestral traveled to Lyon, France, a center of textile manufacturing, to seek help. Most weavers laughed at his idea, but one artisan agreed to create a prototype. Initially, they tried using cotton, but the cotton loops wore out too quickly. De Mestral then turned to a recently invented synthetic material (16) called: nylon. Nylon was durable and, when treated with heat, could be permanently molded into rigid hooks.

⁴ It took De Mestral ten years to perfect the manufacturing process. He had to invent a special loom that could cut the nylon loops at just the right angle to create the hooks. Finally, in 1955, he patented his invention. He named it Velcro, a portmanteau of the French words velours (velvet) and crochet (hook). (17)

⁵ At first, the fashion industry rejected Velcro, considering it ugly and cheap-looking. (18) The zipper was much more popular. The invention's true breakthrough came in the 1960s when NASA began using it. Astronauts found Velcro incredibly useful for securing tools, equipment, and even food pouches in zero gravity. (19) Due to the fact tht NASA endorsed it, the apparel industry took notice. Skiers began wearing jackets with Velcro closures, and soon, it was being used on children's shoes, blood pressure cuffs, and backpacks. Today, this brilliant example of biomimicry—(20) the design of materials modeled on biological entities—is a staple of modern life.

Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. dog's fur were (correct answer)
  3. dogs fur were
  4. dogs fur, were

Explanation: The correct answer is B. Two errors exist in the original: (1) a comma is incorrectly placed between the subject "dog's fur" and the verb "were," and (2) the apostrophe in "dog's" must be preserved to show possession. B correctly removes the comma while retaining the apostrophe. C removes the apostrophe, producing "dogs fur" — a plural noun used as an adjective without the possessive relationship the sentence requires. D removes the apostrophe and keeps the comma, compounding both errors. The subject of the verb "were" is "his clothes and his dog's fur" — a comma between subject and verb is never correct. Pro tip: Never place a comma between a subject and its verb. When you see "subject, verb," always treat it as an error unless an interruptive phrase is set off by commas on both sides.

Question 8

PASSAGE V: The Yellowstone Effect

¹ For nearly seventy years, the gray wolf was completely absent from Yellowstone National Park. Hunted to local extinction in the 1920s, the predator's removal triggered a cascade of negative ecological consequences. Without wolves to keep them in check, the park's elk population exploded. (41) Elk which had overpopulated the park grazed heavily on young willow and aspen trees. As the trees disappeared, so did the songbirds and beavers that relied on them for habitat. By the late twentieth century, Yellowstone's ecosystem was severely unbalanced. (49)

² In 1995, wildlife biologists initiated a controversial program to reintroduce the gray wolf to the park. The scientists predicted that the wolves would cull the elk herds, but what happened next surprised even the most optimistic ecologists. The wolves triggered a phenomenon known as a "trophic cascade," where an apex predator's presence creates a ripple effect throughout the entire food web. (42)

³ The wolves began hunting the elk, which significantly reduced the grazing pressure on the valleys and gorges. (43) Growing along the riverbanks, the elk avoided the open areas where they were most vulnerable. Because the elk were constantly on the move, the young willow and aspen saplings finally had a chance to mature.

⁴ As the forests (44) had recovered, the ecosystem began to transform. The renewed tree growth provided ample wood for beavers, whose population rapidly increased. The beavers built dams, creating deep, cold pools of water that provided ideal habitats for fish, otters, and muskrats. Furthermore, the carcasses of elk hunted by wolves provided a reliable food source for scavengers, including ravens, bald eagles, and grizzly bears. (45) As a result of the consequence of this, the entire biodiversity of the park stabilized.

⁵ Perhaps the most astonishing consequence of (46) the wolfs return was the alteration of Yellowstone's physical geography. Because the stabilizing vegetation prevented soil erosion, the park's rivers actually changed course, becoming deeper and more fixed in their channels. The intricate web of predator and prey relationships (47) are fascinating, proving that sometimes, introducing a fearsome predator is the only way to heal a broken landscape. (48)

Which of the following options makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. the wolf's return
  3. the wolves return
  4. the wolves' return (correct answer)

Explanation: The correct answer is D. The passage discusses the reintroduction of wolves (plural) to Yellowstone — the return belongs to the wolves as a group. When a plural noun ending in "s" is possessive, the apostrophe goes after the "s": "wolves' return." A ("the wolfs return") is wrong on two counts: "wolfs" is not a standard plural form, and there is no apostrophe to show possession. B ("the wolf's return") uses a singular possessive — only one wolf — which contradicts the plural context of the entire passage. C ("the wolves return") omits the apostrophe entirely, producing a sentence where "wolves" is a subject and "return" is a verb with no possessive relationship. Pro tip: For plural nouns ending in "s," the possessive apostrophe goes after the "s" (wolves'). For irregular plurals not ending in "s" (children, men), the apostrophe goes before the added "s" (children's, men's).

Question 9

For the history project, students interviewed local veterans and compiled short biographies. Because the class worked in pairs, each interview produced two separate transcripts. The teacher asked everyone to submit the students' final drafts by Friday so she could assemble the booklet over the weekend. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE (correct answer)
  2. the student's final drafts by Friday
  3. the students final drafts by Friday
  4. the students's final drafts by Friday

Explanation: This question tests possessive apostrophes with plural nouns. The context mentions students (plural) working in pairs who own final drafts, requiring a possessive form. For plural nouns ending in 's,' add only an apostrophe after the 's' to show possession. Choice A correctly uses 'students'' to show that multiple students possess final drafts. Choice B incorrectly makes 'student' singular, choice C lacks the apostrophe entirely, and choice D uses the nonstandard form 'students's.' When you see plural possessive options, remember that regular plural nouns ending in 's' only need an apostrophe after the 's.'

Question 10

Two clubs collaborated on a fundraiser, so both groups staffed the same booth and shared supplies. After counting donations, the treasurer recorded the clubs totals in a spreadsheet and emailed the results to both presidents. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. the club's totals in a spreadsheet
  3. the clubs' totals in a spreadsheet (correct answer)
  4. the clubs's totals in a spreadsheet

Explanation: This question tests possessive apostrophes with plural nouns. The context mentions 'two clubs' (plural) that have totals, requiring a possessive form. For plural nouns ending in 's,' add only an apostrophe after the 's' to show possession. Choice C correctly uses 'clubs'' to show that multiple clubs possess totals. Choice A lacks the apostrophe entirely, choice B incorrectly makes 'club' singular, and choice D uses the nonstandard form 'clubs's.' When determining possessive forms for plural nouns ending in 's,' simply add an apostrophe after the existing 's.'

Question 11

The team took great pride in its victory.

  1. NO CHANGE (correct answer)
  2. it's
  3. its'
  4. it

Explanation: This question tests the difference between 'its' (possessive) and 'it's' (contraction). The context shows the team owns its victory, requiring the possessive form without an apostrophe. 'Its' (no apostrophe) shows possession, while 'it's' (with apostrophe) always means 'it is' or 'it has.' Choice C incorrectly adds an apostrophe to the possessive 'its,' and choice D removes the word entirely. Remember: its (no apostrophe) shows possession; it's (with apostrophe) always means it is or it has.

Question 12

Before the debate tournament, the coach reviewed the schedule with the team and pointed out the earliest round. She told them to arrive by 7:30 because their going to need time to set up the evidence files and practice introductions. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. they're going to need time to set up (correct answer)
  3. there going to need time to set up
  4. their' going to need time to set up

Explanation: This question tests the distinction between possessive pronouns and contractions. The sentence needs a contraction meaning 'they are' going to need time. Choice B correctly uses 'they're,' which contracts 'they are.' The original choice A uses 'their,' which is possessive, choice C uses the incorrect 'there,' and choice D uses the nonexistent form 'their'.' When you see splits between 'their,' 'there,' and 'they're,' substitute the full phrase - 'they are' works here, confirming 'they're' is correct. Remember that 'they're' always means 'they are.'

Question 13

At the farmers' market, two bakers set up side by side and sold bread from similar-looking baskets. When a customer asked about ingredients, the manager pointed to the bakers labels on each loaf to avoid confusion. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. the baker's labels on each loaf
  3. the bakers' labels on each loaf (correct answer)
  4. the bakers labels on each loaf

Explanation: This question tests possessive apostrophes with plural nouns. The context mentions 'two bakers' (plural) who have labels on their loaves, requiring a possessive form. For plural nouns ending in 's,' add only an apostrophe after the 's' to show possession. Choice C correctly uses 'bakers'' to show that multiple bakers possess labels. Choice A lacks the apostrophe entirely, choice B incorrectly makes 'baker' singular, and choice D lacks the apostrophe. When dealing with possessive forms, first determine if the noun is singular or plural, then apply the correct apostrophe placement rule.

Question 14

During a campus cleanup, volunteers sorted bottles, paper, and compost into labeled bins. The coordinator reminded everyone that each bin had a different purpose and that its lid should stay closed to keep out rain and animals. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE (correct answer)
  2. it's lid should stay closed
  3. its' lid should stay closed
  4. it is lid should stay closed

Explanation: This question tests the difference between its (possessive) and it's (contraction). The sentence needs to show that the lid belongs to the bin, requiring the possessive form. 'Its' (no apostrophe) is the possessive form of 'it,' while 'it's' always means 'it is' or 'it has.' Choice B incorrectly uses the contraction, choice C uses a nonexistent form (its' is never correct), and choice D spells out 'it is,' which doesn't make sense. Remember: its (no apostrophe) shows possession; it's (with apostrophe) is always a contraction.

Question 15

At the science fair, three judges compared projects and wrote comments on a shared rubric. Afterward, the teacher collected the judges notes and photocopied them for the students to review. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. the judge's notes
  3. the judges' notes (correct answer)
  4. the judges's notes

Explanation: This question tests plural possessive formation. The context tells us there are three judges, and the notes belong to all of them collectively. For plural nouns ending in 's,' we form the possessive by adding only an apostrophe after the 's.' Choice A lacks any possessive marker, choice B incorrectly suggests one judge, and choice D uses an impossible form (judges's). When you see a split between singular and plural possessives, count the number of people or things mentioned to determine which form you need.

Question 16

Before the debate tournament, the coach told the team to arrive early, review evidence, and keep track of time. She also reminded them that they're arguments would be stronger if they anticipated counterclaims. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. their arguments (correct answer)
  3. there arguments
  4. theyre arguments

Explanation: This question tests the distinction between they're (contraction), their (possessive), and there (location). The sentence needs to show that the arguments belong to the team members, requiring the possessive 'their.' Choice A incorrectly uses 'they're,' which means 'they are' and would create the nonsensical phrase 'they are arguments.' Choice C uses 'there,' indicating location, and choice D uses a nonstandard spelling. When you see this three-way split, substitute the full phrase 'they are' to check if a contraction works—if not, you likely need the possessive 'their.'

Question 17

During the science fair, several teams compared their soil samples' pH levels. Afterward, the judges reviewed each team's notes and praised the students' careful labeling of every container, which made it easy to match results to the correct plots.

Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE (correct answer)
  2. the student's careful labeling of every container
  3. the students careful labeling of every container
  4. the students's careful labeling of every container

Explanation: This question tests the possessive form of a plural noun. The context tells us that multiple teams participated ('several teams'), so we need the plural possessive form to show that the careful labeling belongs to multiple students. The correct form for a plural noun ending in 's' is to add only an apostrophe: students'. Choice A correctly uses 'students'' to show possession by multiple students. Choice B incorrectly uses the singular possessive 'student's,' which would mean only one student did the labeling. Choice C omits the apostrophe entirely, making 'students' merely plural without showing possession. Choice D uses the nonstandard form 'students's,' which is never correct. When you see a noun ending in 's' followed by another noun, check whether possession is involved—if so, you need an apostrophe.

Question 18

In the library makerspace, two students reserved the 3D printer for the same hour. The staff member checked the schedule and explained that the students reservation had been entered incorrectly, so it needed to be fixed before printing could begin. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. the student's reservation
  3. the students' reservation (correct answer)
  4. the students reservation's

Explanation: This question tests plural possessive usage. The sentence states that two students made the reservation, so we need the plural possessive form. For plural nouns ending in 's,' we add only an apostrophe after the 's' to show possession. Choice A lacks the possessive marker, choice B incorrectly uses singular possessive for two students, and choice D places the apostrophe incorrectly at the end. Always check the context to determine whether you're dealing with one or multiple owners before choosing between singular and plural possessive forms.

Question 19

At the museum, the guide pointed to a fossil display and asked visitors to read the placard carefully. The guide explained that who's label you read matters because each specimen came from a different site and time period. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. whose label (correct answer)
  3. whos label
  4. who label's

Explanation: This question tests the difference between who's (contraction) and whose (possessive). The sentence needs to indicate which label belongs to which specimen, requiring the possessive 'whose.' 'Who's' always means 'who is' or 'who has,' which doesn't make sense here ('who is label you read'). Choice C omits the apostrophe from the contraction, creating a nonexistent word, and choice D places the apostrophe incorrectly. Remember: whose (no apostrophe) shows possession; who's (with apostrophe) is always a contraction meaning 'who is' or 'who has.'

Question 20

During rehearsal, the stage manager asked the cast to place props exactly where they belonged. She emphasized that the actors costumes should be hung on the same rack each night so nothing went missing between scenes. Which choice makes the sentence most grammatically acceptable?

  1. NO CHANGE
  2. the actor's costumes
  3. the actors' costumes (correct answer)
  4. the actors's costumes

Explanation: This question tests plural possessive formation. The context mentions 'the cast,' indicating multiple actors, and the costumes belong to all of them. For plural nouns ending in 's,' we form the possessive by adding only an apostrophe after the 's.' Choice A lacks the necessary possessive marker, choice B incorrectly suggests one actor when the context indicates multiple, and choice D uses an impossible form. When deciding between singular and plural possessives, look for context clues like 'cast' or 'team' that indicate multiple people.