The Apostrophe Rules That Matter Most in Academic Writing
Apostrophe errors are among the most visible grammatical mistakes in written English because they appear frequently and because readers notice them instinctively once they understand the rules. In Malaysian postgraduate theses, the most common apostrophe errors involve three specific patterns: it’s versus its, the possessive apostrophe in plural nouns, and the incorrect use of apostrophes to form plurals. Each has a clear rule that, once known, enables systematic correction during proofreading.
It’s Versus Its
“It’s” is always a contraction of “it is” or “it has” — never a possessive. “Its” is always possessive — “the study and its limitations”, “the framework and its applications.” Because formal academic writing does not use contractions, “it’s” should never appear in a thesis at all. During proofreading, search for every instance of “it’s” in your thesis and verify either that it should be “its” (possessive) or that the sentence should be rewritten to remove the contraction entirely. In most cases, the fix is simply replacing “it’s” with “its”.
Possessives for Plural Nouns
Plural nouns that already end in “s” form the possessive by adding only an apostrophe after the final s, not an apostrophe followed by another s. “The participants’ responses” (many participants, their responses) is correct. “The participants’s responses” is incorrect. “The researchers’ findings” is correct for multiple researchers. Singular nouns form the possessive with apostrophe-s: “the researcher’s findings” for one researcher. The distinction is simple: singular noun, add apostrophe-s; plural noun ending in s, add only an apostrophe.
Apostrophes Do Not Form Plurals
One of the most persistent apostrophe errors in Malaysian academic writing is using an apostrophe to form a plural: “the 1990’s”, “several CEO’s”, “two PhD’s.” Apostrophes do not pluralise nouns. The correct forms are “the 1990s”, “several CEOs”, “two PhDs.” The only exceptions are when omitting the apostrophe would create genuine ambiguity — “mind your p’s and q’s” — but these situations rarely arise in formal academic writing. Search for any sequence of capital letters or a number followed by an apostrophe-s in your thesis and evaluate whether each instance is a true possessive or an incorrectly formed plural.
Apostrophe errors are easy to fix once identified but easy to miss during reading because the misused apostrophe does not typically change the phonetic sound of the word. A targeted search-based proofreading pass focused specifically on apostrophes takes under ten minutes per chapter and eliminates a category of error that experienced academic readers notice immediately.
