10 Common English Grammar Mistakes and How to Avoid Them



Understanding grammar is essential for mastering English, but even the most experienced learners can stumble over common errors. This article explores 10 Common English Grammar Mistakes and How to Avoid Them, ensuring your writing is both clear and correct.

Mos Common Grammar Mistakes in English

MistakeError TypeCorrect UsageExample
Its vs. It’sPossessive vs. Contraction“Its” (possessive), “It’s” (it is)“The cat licked its paws.” / “It’s raining.”
There, Their, They’reHomophones“There” (location), “Their” (possessive), “They’re” (they are)“Look over there.” / “Their car is fast.” / “They’re playing soccer.”
Your vs. You’rePossessive vs. Contraction“Your” (possessive), “You’re” (you are)“Is this your book?” / “You’re late.”
Subject-Verb AgreementSubject-Verb MismatchMatch singular subjects with singular verbs and plural with plural“She runs every day.” / “They run every day.”
Affect vs. EffectVerb vs. Noun“Affect” (verb), “Effect” (noun)“The news will affect me.” / “The effect was surprising.”
Then vs. ThanTime vs. Comparison“Then” (sequence), “Than” (comparison)“We will eat, then go.” / “She is taller than him.”
Who vs. WhomSubject vs. Object“Who” (subject), “Whom” (object)“Who called you?” / “Whom did you call?”
Loose vs. LoseAdjective vs. Verb“Loose” (not tight), “Lose” (misplace)“My shoe is loose.” / “Don’t lose your keys.”
Fewer vs. LessCountable vs. Uncountable“Fewer” (countable), “Less” (uncountable)“Fewer students attended.” / “Less time was needed.”
Me vs. IObject vs. Subject“I” (subject), “Me” (object)“Tom and I went.” / “He saw Tom and me.”

1. Its vs. It’s

  • Mistake: Mixing up “its” (possessive form) and “it’s” (contraction of “it is”).
  • Tip: Always use “it’s” for “it is” or “it has.” If not, use “its.”

2. There, Their, and They’re

  • Mistake: Confusing “there” (location), “their” (possessive form of they), and “they’re” (contraction of “they are”).
  • Tip: Remember: “there” for places, “their” for possession, “they’re” for “they are.”

3. Your vs. You’re

  • Mistake: Using “your” (possessive) instead of “you’re” (contraction of “you are”).
  • Tip: Replace with “you are” to check. If it fits, use “you’re.”

4. Subject-Verb Agreement

  • Mistake: Mismatching the subject and verb, especially with plural subjects.
  • Tip: Singular subjects = singular verbs (e.g., “He runs”). Plural subjects = plural verbs (e.g., “They run”).

5. Affect vs. Effect

  • Mistake: Confusing “affect” (verb) and “effect” (noun).
  • Tip: “Affect” is an action; “effect” is a result. Think “A” for action, “E” for end result.

6. Then vs. Than

  • Mistake: Misusing “then” (refers to time) and “than” (used for comparisons).
  • Tip: “Then” relates to time, while “than” is for comparisons.

7. Who vs. Whom

  • Mistake: Using “who” instead of “whom” and vice versa.
  • Tip: Use “who” as the subject (e.g., “Who called?”) and “whom” as the object (e.g., “To whom did you speak?”).

8. Loose vs. Lose

  • Mistake: Confusing “loose” (adjective meaning not tight) with “lose” (verb meaning to misplace or fail to win).
  • Tip: “Loose” rhymes with “goose.” “Lose” has a “z” sound, like “snooze.”

9. Fewer vs. Less

  • Mistake: Using “less” with countable nouns and “fewer” with uncountable nouns.
  • Tip: “Fewer” for countable items (e.g., “fewer apples”), “less” for uncountable (e.g., “less water”).

10. Me vs. I

  • Mistake: Incorrectly using “me” instead of “I” and vice versa.
  • Tip: Use “I” for subjects (e.g., “John and I”) and “me” for objects (e.g., “to John and me”).

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Conclusion

By understanding and avoiding these common grammar mistakes, you can significantly improve your English communication skills. Whether writing emails, reports, or casual messages, accurate grammar enhances clarity and professionalism. Practice regularly, review these tips, and soon these common errors will become a thing of the past!

FAQ – 10 Common Grammar Mistakes

What is the difference between “your” and “you’re”?

“Your” is a possessive adjective, used to indicate that something belongs to you (e.g., “your book”). “You’re” is a contraction of “you are” (e.g., “you’re going to the store”). To avoid confusion, remember: if you can replace the word with “you are,” then “you’re” is the correct choice

How can I avoid confusing “their,” “there,” and “they’re”?

“Their” indicates possession (e.g., “their house”).
“There” refers to a place or position (e.g., “over there”).
“They’re” is a contraction of “they are” (e.g., “they’re coming”).

A good way to avoid confusion is to replace “they’re” with “they are” in your sentence. If it makes sense, use “they’re”

When should I use “it’s” versus “its”?

“It’s” is a contraction of “it is” or “it has” (e.g., “it’s raining”). “Its” is a possessive pronoun, used to show that something belongs to it (e.g., “The cat chased its tail”). To check which to use, see if “it is” fits in your sentence; if it does, “it’s” is correct​

How do I properly use apostrophes?

Apostrophes are used to show possession (e.g., “the dog’s leash”) and to indicate missing letters in contractions (e.g., “can’t” for “cannot”). Avoid using apostrophes to form plurals, which is a common mistake (e.g., “CDs” is correct, not “CD’s”)

What are the rules for using “a” and “an”?

Use “a” before words that begin with a consonant sound (e.g., “a cat”) and “an” before words that begin with a vowel sound (e.g., “an apple”). The choice depends on sound rather than the actual first letter, so “an hour” is correct because “hour” starts with a vowel sound.