Grammar and Usage Guides

Short, precise answers to the word choices that trip up essay writers, each with examples, a memory trick and a quick quiz.

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Updated 21 October 2026 · EssayWriting.com editorial team

Affect vs Effect: What Is the Difference?

Affect vs effect explained: affect is usually a verb (to influence), effect is usually a noun (a result).…

Its vs It's: The Difference Explained

Its vs it's: it's always means it is or it has; its shows possession, with no apostrophe. Clear rules,…

Whose vs Who's: What Is the Difference?

Whose vs who's: who's means who is or who has; whose shows possession or asks who something belongs to.…

Then vs Than: What Is the Difference?

Then vs than: use than for comparisons (bigger than) and then for time or sequence (first this, then that).…

Who vs Whom: When to Use Each

Who vs whom: use who for the subject (he/she) and whom for the object (him/her). The he/him test, examples…

i.e. vs e.g.: What Is the Difference?

i.e. vs e.g.: e.g. means for example (one of several), i.e. means that is (the only one). Meanings, comma…

Compliment vs Complement: What Is the Difference?

Compliment vs complement: a compliment is praise; a complement completes or goes well with something.…

Further vs Farther: What Is the Difference?

Further vs farther: farther is for physical distance; further is for figurative distance, degree and…

Principal vs Principle: What Is the Difference?

Principal vs principle: principal means main or the head of a school; principle means a rule or belief.…

There, Their and They're: What Is the Difference?

There vs their vs they're: there is a place or existence, their shows possession, they're means they are.…

Your vs You're: What Is the Difference?

Your vs you're: you're means you are; your shows possession. A one-second test, examples, common mistakes and…

Lose vs Loose: What Is the Difference?

Lose vs loose: lose (one o) is a verb meaning to misplace or fail to win; loose (two o) means not tight.…

Toward vs Towards: Which Should You Use?

Toward vs towards: both are correct and mean the same. Toward is preferred in American English, towards in…

Among vs Amongst: What Is the Difference?

Among vs amongst: both mean the same; among is more common and modern, amongst is mainly British and more…

Colon vs Semicolon: What Is the Difference?

Colon vs semicolon: a colon introduces something (a list, explanation or quote); a semicolon joins two…

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