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10 most common grammatical errors ?

The 10 Most Common Grammatical Errors—and How to Never Make Them Again

We’ve all been there. You hit “send” on an important e-mail, re-read it two seconds later, and spot an embarrassing mistake: *its* instead of *it’s*, *their* instead of *there*, or *affect* when you meant *effect*.

Below are the ten slips that show up most often in blogs, résumés, cover letters, social-media posts and even published articles. Learn to recognise them once, and you’ll catch them for life.

1. Its vs. It’s
Wrong: The puppy wagged it’s tail.
Right: The puppy wagged its tail.
Rule: No apostrophe for possession; apostrophe only for the contraction *it is* / *it has*.

2. Their / There / They’re
Wrong: Their going to meet us there.
Right: They’re going to meet us there.
Rule: *Their* = possessive; *there* = place / direction; *they’re* = *they are*.

3. Your vs. You’re
Wrong: Your the best!
Right: You’re the best!
Rule: *You’re* = *you are*; *your* shows ownership.

4. Affect vs. Effect
Wrong: The medicine had positive affects.
Right: The medicine had positive effects.
Rule: *Affect* (verb) = to influence; *effect* (noun) = the result.

5. Fewer vs. Less
Wrong: Less people attended today.
Right: Fewer people attended today.
Rule: Use *fewer* for countable nouns; *less* for uncountable quantities.

6. Lay vs. Lie
Wrong: I’m going to lay down for an hour.
Right: I’m going to lie down for an hour.
Rule: *Lie* = to recline (intransitive); *lay* = to put something down (transitive).

7. Subject–Verb Agreement
Wrong: The list of tasks are long.
Right: The list of tasks is long.
Rule: The verb agrees with the grammatical subject (*list*, not *tasks*).

8. Who vs. Whom
Wrong: Who did you give the book to?
Right: Whom did you give the book to?
Rule: Use *whom* when the pronoun is the object of the verb or preposition.

9. Than vs. Then
Wrong: I’d rather walk then drive.
Right: I’d rather walk than drive.
Rule: *Than* introduces a comparison; *then* indicates time or sequence.

10. Comma Splice
Wrong: She loves tennis, she plays every weekend.
Right: She loves tennis; she plays every weekend.
Rule: Two independent clauses need a period, semicolon or coordinating conjunction.

Master these ten trouble spots and your writing will sound sharper, clearer and more professional—every single time.