TOEIC Link Writing Apostrophe and Possessive Precision for Ownership Clarity: Where the Apostrophe Goes and What It Claims

In TOEIC Link Writing, the apostrophe is a small mark that carries a specific claim: it says who owns what. "The manager's decisions" claims one manager; "the managers' decisions" claims several. The difference is one character's position, and it changes the fact the sentence states. A scorer reading for the accuracy of written English notices whether a candidate controls that position, because a misplaced or missing apostrophe either names the wrong owner or turns a possessive into a plural. And because the apostrophe also distinguishes contractions from possessives — "its" versus "it's", "their" versus "they're" — the same mark is where two of the most common written-English errors live.

The difficulty is that the apostrophe rules feel mechanical until a candidate meets a plural owner, an irregular plural, or a pronoun that breaks the pattern. "The company's" and "the companies'" are both correct for different owners; "its" takes no apostrophe even though it is possessive, while "it's" always means "it is". A writer who applies one rule everywhere — always add "'s", or never use an apostrophe on a pronoun — will be right half the time and wrong the other half, and the wrong half changes meaning or reads as a basic error.

This article is the apostrophe-and-possessive discipline for TOEIC Link Writing. The guide covers where the apostrophe goes for singular and plural owners, the pronoun possessives that break the apostrophe pattern, the contraction confusions that share the mark, and the proofreading pass that catches the errors.

Where the apostrophe goes for singular and plural owners

The position of the apostrophe relative to the -s encodes the number of the owner, so the rule starts with identifying the owner.

A singular owner takes apostrophe-then-s. "The client's request" marks one client as the owner. This holds even when the singular noun already ends in -s: "the boss's office", "the business's policy" — a singular owner takes "'s" regardless of its final letter in standard business style. The apostrophe sits before the possessive -s because there is one owner.

A plural owner ending in -s takes s-then-apostrophe. "The clients' requests" marks several clients as owners. The plural is already formed with -s, so the possessive apostrophe goes after that -s with no second s added: "the employees' benefits", "the shareholders' vote". The apostrophe after the -s is the sentence saying the owner is plural.

An irregular plural not ending in -s takes apostrophe-then-s like a singular. "Children", "people", "women", "men" form their plural without -s, so the possessive follows the singular pattern: "the children's section", "the people's choice", "the women's team". Because the plural is not marked by -s, the "'s" is added just as it would be for a singular owner. Reading the owner's number and its spelling together is what sets the apostrophe correctly, and that owner-number decision is the same one that governs subject-verb agreement with intervening phrases.

The pronoun possessives that break the apostrophe pattern

Possessive pronouns are possessive without an apostrophe, and this is where the rule most often fails.

Possessive pronouns and adjectives never take an apostrophe. "Its", "his", "hers", "ours", "yours", "theirs", "whose" are all possessive and all apostrophe-free. "The report lost its cover" is correct; "its' cover" and "it's cover" are both wrong. The apostrophe that marks possession on nouns does not appear on these pronouns, which already carry possession in their form.

"Its" and "it's" are the single most consequential pair. "Its" is the possessive ("the team met its target"); "it's" is only ever the contraction of "it is" or "it has" ("it's late", "it's been decided"). The test is expansion: if "it is" fits, write "it's"; if not, write "its" with no apostrophe. This one substitution decides the pair every time, and getting it wrong is the error scorers flag most often.

"Whose" and "who's" split the same way. "Whose" is possessive ("the vendor whose bid won"); "who's" is the contraction of "who is" or "who has" ("who's responsible"). The same expansion test applies — try "who is" — and the same discipline that keeps a pronoun pointing at the right owner in pronoun-antecedent agreement keeps "whose" from being written as "who's".

The contraction confusions that share the apostrophe

Because the apostrophe also forms contractions, several homophone pairs turn on whether the apostrophe belongs at all.

"Their", "there", and "they're" are three different words that sound alike. "Their" is the possessive ("their office"), "there" is the place or existential ("there is a delay"), and "they're" is the contraction of "they are" ("they're arriving"). None is a spelling variant of the others; each is chosen by meaning. Substituting "they are" tests for "they're"; asking "does it show possession" tests for "their"; the remaining place-or-existence sense is "there".

"Your" and "you're" split on the apostrophe alone. "Your" is possessive ("your account"); "you're" is "you are" ("you're approved"). The expansion test — try "you are" — settles it. In a business register the possessive "your" is far more common, so "you're" should appear only where "you are" genuinely fits.

A plural is not a possessive and takes no apostrophe. "The reports are ready" needs no apostrophe on "reports" — it is a plain plural, not a possessive. Writing "the report's are ready" adds an apostrophe that claims ownership where none is meant, one of the most common stray-apostrophe errors. An apostrophe on a noun should always answer the question "owner of what?"; if there is no owned thing, the apostrophe does not belong.

The apostrophe proofreading pass

Before submitting, the candidate runs a pass that checks every apostrophe and every possessive.

Check one: for each possessive noun, confirm the apostrophe matches the owner's number. Singular owner takes "'s"; plural owner ending in -s takes "s'"; irregular plural takes "'s". Read the owner, decide its number and spelling, and place the apostrophe accordingly. This sets the position for every noun possessive.

Check two: expand every "it's", "who's", "they're", and "you're". For each, try the full form ("it is", "who is", "they are", "you are"). If it fits, the contraction is correct; if not, switch to the apostrophe-free possessive ("its", "whose", "their", "your"). This single expansion test resolves the whole homophone set.

Check three: confirm no plain plural carries an apostrophe. Scan for apostrophes on nouns and check each one owns something. A "'s" or "s'" with no owned noun after it is a plural wearing a possessive apostrophe, and removing the stray mark fixes it.

A response that passes all three checks marks ownership exactly where it is meant and nowhere it is not. That precision is what TOEIC Link Writing rewards when it scores the accuracy of written English, and the apostrophe — one character whose position names the owner and whose presence separates a possessive from a contraction — is where that accuracy is won or lost.