English Grammar & Syntax Quiz: Compound Noun Possessives
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Compound Noun PossessivesQuestion 1 of 10

Two sisters-in-law submitted separate work schedules. The coordinator placed both schedules on the same desk.

Which possessive form correctly completes the sentence? "The coordinator compared the   before assigning shifts."

sisters-in-law's schedules
sister's-in-law schedules
sisters'-in-law schedules
sister-in-laws' schedules
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English Grammar & Syntax Quiz

English Grammar & Syntax Quiz: Compound Noun Possessives

Practice Compound Noun Possessives in English Grammar & Syntax 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 Compound Noun Possessives, giving you a quick way to practice the rules, question types, and explanations that matter most for English Grammar & Syntax.

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

Two sisters-in-law submitted separate work schedules. The coordinator placed both schedules on the same desk.

Which possessive form correctly completes the sentence? "The coordinator compared the   before assigning shifts."

  1. sisters-in-law's schedules (correct answer)
  2. sister's-in-law schedules
  3. sisters'-in-law schedules
  4. sister-in-laws' schedules
Explanation: When forming possessives with compound nouns like "sister-in-law," you need to identify two things: where the plural belongs, and where the apostrophe goes. These are independent decisions that students often confuse. For hyphenated compound nouns, the plural is formed on the main noun — the word doing the primary work. In "sister-in-law," that main noun is "sister," so the plural becomes "sisters-in-law." This is similar to how "mothers-in-law" or "attorneys-at-law" work. Now, once you have the correct plural, forming the possessive is straightforward: add 's to the end of the complete plural form. That gives you "sisters-in-law's." Choice A — "sisters-in-law's schedules" — correctly pluralizes at "sisters" and then appends the possessive 's to the full compound. This is your answer. Choice B — "sister's-in-law" — misplaces the possessive apostrophe mid-compound after "sister," as if "in-law" were a modifier tagged on afterward. Apostrophes always attach to the final word of the complete noun being made possessive. Choice C — "sisters'-in-law" — pluralizes correctly at "sisters" but then tries to attach the apostrophe there rather than at the end of the full compound. The possessive marker must close the entire noun phrase. Choice D — "sister-in-laws'" — makes the classic mistake of pluralizing at the wrong end of the compound, treating "law" as the main noun. The result is both grammatically and logically wrong. A useful rule to remember: pluralize the head noun first, then add the possessive to the tail. Whenever you see a hyphenated compound, find the core noun — it's usually first — and build from there.

Question 2

One attorney general issued a recommendation concerning the proposed regulation.

Which phrase correctly completes the sentence? "The committee adopted the   without revision."

  1. attorney's general recommendation
  2. attorney general's recommendation (correct answer)
  3. attorneys general's recommendation
  4. attorney generals' recommendation
Explanation: When a noun functions as a title or compound term, possessive apostrophes can get tricky — and compound official titles like attorney general are a classic exam trap. The key question to ask yourself is: what is the "head" noun that gets pluralized, and where does the possessive belong? In English, compound titles like attorney general follow an older grammatical pattern where the main noun (attorney) comes first and general acts as a modifier. This means the plural is attorneys general (not attorney generals), and the singular possessive is attorney general's — the apostrophe attaches to the end of the full title, not just the first word. The passage refers to one attorney general, so you need the singular possessive: attorney general's recommendation. That makes B the correct answer. Here's why the other choices fail. A (attorney's general recommendation) incorrectly places the apostrophe after attorney alone, splitting the compound title as if general were a separate noun — it isn't. C (attorneys general's recommendation) uses the correct plural form of the title, but the passage specifies a single attorney general, so the plural is factually wrong for this sentence. D (attorney generals') makes two errors at once: it forms the plural incorrectly by treating attorney general as a regular compound (wrong — it's attorneys general), and places the apostrophe after generals, compounding the mistake. A useful tip: whenever you see a compound official title (surgeon general, postmaster general), remember that the first noun pluralizes (surgeons general), and the possessive apostrophe always attaches to the end of the full title, not the middle of it.

Question 3

The speaker's mother-in-law owns one car, and the speaker's father-in-law owns a different car. The two cars are kept in separate garages.

Which sentence correctly shows that each person separately owns a car?

  1. My mother-in-law and father-in-law's cars are garaged separately.
  2. My mother-in-law's and father-in-law's cars are garaged separately. (correct answer)
  3. My mother's-in-law and father's-in-law cars are garaged separately.
  4. My mothers-in-law's and fathers-in-law's cars are garaged separately.
Explanation: When a question asks about possession involving compound nouns or multiple owners, you need to think carefully about where the apostrophe goes — and whether each person owns something separately or jointly. The key rule here is individual (separate) possession: when two people each independently own something, each noun gets its own apostrophe + s. So "my mother-in-law's and father-in-law's cars" signals that each person has their own car — exactly what the passage describes. That makes B the correct answer. A is wrong because only "father-in-law" receives the apostrophe ("father-in-law's"), which implies joint ownership — as if both in-laws share the same cars together. Placing the apostrophe only on the final noun is the rule for joint possession, not separate possession. C misplaces the apostrophe entirely. "Mother's-in-law" is grammatically incorrect. For hyphenated compound nouns like mother-in-law, the apostrophe always attaches to the last word of the compound: "mother-in-law's," not "mother's-in-law." D treats "mothers-in-law" and "fathers-in-law" as if the sentence is talking about multiple mothers-in-law and multiple fathers-in-law. Those are correct plural forms, but the passage specifies one of each — so pluralizing here misrepresents the situation entirely. Your study tip: memorize two rules together — (1) separate ownership = apostrophe on each noun; joint ownership = apostrophe on the last noun only; and (2) hyphenated titles take the apostrophe at the very end of the full compound, never in the middle.

Question 4

At the community center, one lounge is reserved for all of the adult volunteers rather than for a single adult.

Which phrase correctly completes the posted notice? "Please keep   locked during the children's program."

  1. the grown-up's lounge
  2. the grown-ups's lounge
  3. the grown-ups' lounge (correct answer)
  4. the growns-up' lounge
Explanation: Possessive nouns require two decisions: where to place the apostrophe, and whether the noun is singular or plural. When you see a question like this, first determine who the possessor is and how many of them there are before touching the apostrophe. The passage tells you the lounge belongs to all adult volunteers — a group, not one person. The plural of "grown-up" is "grown-ups" (the "s" attaches to the end of the full compound word). To make a plural noun possessive when it already ends in "s," you simply add an apostrophe after the final "s," giving you grown-ups'. Choice C, the grown-ups' lounge, correctly signals that the lounge belongs to multiple grown-ups. Choice A, the grown-up's lounge, uses a singular possessive, implying only one grown-up owns the lounge — contradicting the passage's "all of the adult volunteers." Choice B, the grown-ups's lounge, adds both an apostrophe and an extra "s" after a plural noun that already ends in "s." Regular plural nouns never take that double ending; only certain singular proper nouns (like James's) sometimes do. Choice D, the growns-up' lounge, makes two errors at once: it pluralizes the wrong word ("growns" instead of "grown-ups") and places the apostrophe before the final "s" rather than after it. A useful rule of thumb: for regular plural nouns ending in "s," always place the apostrophe after the "s" — never before it, and never add a second "s." Getting that sequence right eliminates the most common possessive traps.

Question 5

Nora Bell works in the east wing, and Tessa Green works in the west wing. Each employee has her own office.

Which sentence correctly expresses the separate possession described in the passage?

  1. Nora Bell and Tessa Green's offices are in different wings.
  2. Nora Bells' and Tessa Greens' offices are in different wings.
  3. Nora Bell's and Tessa Green offices are in different wings.
  4. Nora Bell's and Tessa Green's offices are in different wings. (correct answer)
Explanation: When a question involves possession and multiple owners, you need to determine whether they share one thing jointly or each own something separately. This passage tells you clearly that each employee has her own office — meaning two distinct owners, two distinct possessions. That calls for separate possession, where each name gets its own apostrophe-s. That makes D the correct answer. "Nora Bell's and Tessa Green's offices" signals that each woman independently owns her office, which perfectly reflects the passage. Both names carry their own possessive marker ('s), confirming individual ownership. A uses only one apostrophe-s on the final name ("Nora Bell and Tessa Green's"), which signals joint possession — as if they share a single set of offices together. That contradicts the passage, where each woman has her own space. B places the apostrophe after the final s in both names ("Bells'" and "Greens'"), which would only be correct if the names themselves were plurals (e.g., "the Bell family"). Since these are singular proper names, this punctuation is wrong entirely. C gives "Nora Bell's" the correct possessive but leaves "Tessa Green" without any apostrophe at all, making it look like a plain noun rather than a possessive — an incomplete and inconsistent construction. A useful rule to remember: if each owner possesses something independently, every name in the list gets its own 's. Only add 's to the last name when ownership is shared (e.g., "Nora and Tessa's shared workspace"). Spotting that distinction will help you handle possession questions quickly and accurately.

Question 6

A family whose surname is Williams has one son-in-law. That son-in-law owns a restaurant.

Which phrase correctly identifies the restaurant through both levels of possession?

  1. the William's son-in-law's restaurant
  2. the Williamses's son-in-law's restaurant
  3. the Williamses' son-in-law's restaurant (correct answer)
  4. the Williamses' son's-in-law restaurant
Explanation: When a question asks you to show possession through multiple "layers," you need to handle each possessive carefully — and that starts with correctly pluralizing the family name before adding any apostrophe. The Williams family's plural form is Williamses — you add -es to surnames ending in -s, just as you would with any common noun (one bus, two buses). To show possession of that plural noun, you simply add an apostrophe after the final letter: Williamses'. Then you chain the next possessive: the son-in-law owns the restaurant, so you add 's to son-in-law, giving you the full phrase: the Williamses' son-in-law's restaurant. That's exactly what option C provides, making it correct. Option A, the William's son-in-law's restaurant, fails at the very first step — it drops the -es plural ending entirely and treats "William" as a singular noun, which misrepresents the family. Option B, the Williamses's son-in-law's restaurant, adds both an apostrophe and an extra s after the plural ending, which is incorrect; plural nouns already ending in s take only an apostrophe. Option D, the Williamses' son's-in-law restaurant, hyphenates the wrong words — the compound noun is son-in-law, not son's-in-law — and also omits the possessive apostrophe on son-in-law itself. A handy tip: for chained possessives, work left to right. First, pluralize the name correctly, then mark its possession, then handle each additional owner in sequence. Treat compound nouns like son-in-law as single units — possession goes on the last word, not inside the hyphen.

Question 7

A carpenter is describing the toolbox that belongs to her one brother-in-law.

Which phrase correctly completes the sentence? "I returned   after borrowing it for the weekend."

  1. my brother's-in-law toolbox
  2. my brother-in-law's toolbox (correct answer)
  3. my brothers-in-law toolbox
  4. my brother-in-laws' toolbox
Explanation: When a noun phrase uses a hyphenated compound like brother-in-law, knowing where to place the possessive apostrophe is the core challenge. The rule is simple: the possessive 's always attaches to the end of the entire compound noun, not to one of its interior words. Brother-in-law is a single compound noun meaning one specific person. To show that something belongs to him, you treat the whole phrase as a unit and add 's to the final word: brother-in-law's. That makes B — my brother-in-law's toolbox — the correct answer. The passage specifies one brother-in-law, and the possessive is properly placed at the end of the compound. Looking at why the other options fail: A (brother's-in-law) wrongly attaches the possessive to brother, an interior word in the compound, which breaks the compound apart and is grammatically nonsensical. C (brothers-in-law toolbox) is the correct plural form of the noun — used when referring to multiple brothers-in-law — but it has no apostrophe at all, so it expresses no possession. D (brother-in-laws') makes two errors simultaneously: it forms the plural incorrectly by adding -s to the end of the compound rather than to brother (the correct plural is brothers-in-law), and the apostrophe placement would only work for a plural possessive, which doesn't match the singular context given. A reliable tip: for any hyphenated compound, always pluralize or possessive-mark the main noun (brother), and always place the possessive 's at the very end of the full compound — never in the middle.

Question 8

Maya Chen and Luis Ortega jointly wrote one proposal for the neighborhood council.

Which sentence correctly shows that the proposal belongs to both writers jointly?

  1. Maya Chen's and Luis Ortega's proposal was approved.
  2. Maya Chen's and Luis Ortega proposal was approved.
  3. Maya Chen and Luis Ortega's proposal was approved. (correct answer)
  4. Maya Chen and Luis Ortega proposal was approved.
Explanation: When two or more people share joint ownership of something, English grammar uses a specific possessive pattern: only the last name in the series gets the apostrophe-s. This is called joint possession, and it signals that both people share a single thing together — one proposal, one car, one idea. That's exactly why C is correct. "Maya Chen and Luis Ortega's proposal" places the apostrophe-s only on Ortega's name, indicating that both writers co-own a single proposal together. The structure mirrors the original passage perfectly — one proposal, jointly written. Here's where the distractors go wrong. A uses apostrophe-s on both names ("Maya Chen's and Luis Ortega's"), which signals separate possession — as if each person had their own individual proposal. That contradicts the passage. B applies the apostrophe-s only to Chen's name while leaving Ortega's unmarked entirely, which is grammatically inconsistent and doesn't clearly indicate possession for either party. D omits the apostrophe-s from both names, leaving "proposal" with no possessive marker at all — it reads like a noun adjunct at best and is simply incorrect for showing ownership. The key strategy here is to ask yourself: Is this shared or separate? If two people own one thing together, put the apostrophe-s only on the last name (joint possession). If each person owns their own version, both names get apostrophe-s (separate possession). On grammar exams, joint vs. separate possession is a classic trap — knowing this one rule will help you navigate it every time.

Question 9

The speaker's brother-in-law and sister jointly own a single bakery.

Which sentence correctly expresses their joint ownership?

  1. My brother's-in-law and sister's bakery opens early.
  2. My brother-in-law's and sister's bakery opens early.
  3. My brother-in-laws' and sister's bakery opens early.
  4. My brother-in-law and sister's bakery opens early. (correct answer)
Explanation: When two or more people jointly own something, English grammar requires only the last noun in the series to take the possessive apostrophe. This signals that both parties share a single item together. When ownership is separate, each noun gets its own apostrophe-s. Keeping that distinction clear is the key to this question. Since the passage tells you the brother-in-law and sister jointly own one bakery, only the final noun in the pair needs the possessive marker. That makes D correct: My brother-in-law and sister's bakery — the apostrophe-s sits only on sister, indicating shared ownership of a single bakery. Here's why the other options fail. A misplaces the possessive inside the hyphenated compound word (brother's-in-law), which is never grammatically acceptable — possessives on compound nouns always attach to the end: brother-in-law's. B applies apostrophe-s to both nouns (brother-in-law's and sister's), which would actually imply they each own separate bakeries — the exact opposite of what the passage states. C makes two errors at once: it incorrectly pluralizes the compound noun as brother-in-laws (the correct plural is brothers-in-law) and then adds an apostrophe after the s, producing a nonsensical form. A handy tip: ask yourself, "Is this shared or separate ownership?" Shared → one apostrophe on the last noun only. Separate → each noun gets its own. Also remember that for hyphenated compounds like brother-in-law, the possessive always attaches to the very end of the full compound.

Question 10

A bicycle belonging to Miguel de la Cruz was found outside the library.

Which sentence correctly treats the owner's entire multiword surname as one name?

  1. Miguel de la Cruz's bicycle was found outside. (correct answer)
  2. Miguel de la Cruz bicycle was found outside.
  3. Miguel de la's Cruz bicycle was found outside.
  4. Miguel's de la Cruz bicycle was found outside.
Explanation: When forming a possessive with a person's full name — including multiword surnames — the rule is straightforward: treat the entire name as a single unit and add 's only at the very end of it. This question tests whether you recognize that "de la Cruz" is one complete surname, not a series of separate words requiring individual treatment. Because "Miguel de la Cruz" functions as one full name, the possessive is formed by attaching 's to the final word of that name: Miguel de la Cruz's bicycle. This is exactly what A does, making it the correct answer. The apostrophe and s attach to "Cruz" — the last element of the complete name — signaling ownership cleanly and correctly. B drops the apostrophe and s entirely, producing Miguel de la Cruz bicycle, which is just a noun phrase with no possessive marker at all. Without 's, there's no grammatical indication that Miguel owns the bicycle. C bizarrely splits the surname mid-phrase, attaching 's to "la" (de la's), which treats "la" as the end of the name and leaves "Cruz" floating — this reflects a misunderstanding of where surnames end and where punctuation belongs. D places 's after "Miguel" alone, making only the first name possessive while leaving the surname as a loose modifier, which distorts the meaning entirely. A handy rule to remember: no matter how long a name is, possessive 's goes on the last word only. On grammar exams, multiword names and titles are common traps designed to tempt you into splitting the possessive — don't take the bait.