10 Common English Grammar Mistakes and How to Fix Them

Introduction

Making mistakes is a natural part of learning English, but some errors keep appearing again and again. Whether you are writing an email, speaking with a friend, or preparing for an exam, knowing these 10 common English grammar mistakes will help you sound more natural and professional. In this post, we will look at each mistake, explain why it happens, and give you simple fixes you can use today.

What Are Common English Grammar Mistakes?

Common English grammar mistakes are errors that many learners (and sometimes native speakers) make regularly. They often involve confusing similar words, using the wrong verb tense, or forgetting basic rules like subject-verb agreement. The good news? Once you know them, they are easy to avoid.

Rules for Avoiding These Mistakes

1. Always check subject-verb agreement. Singular subjects need singular verbs; plural subjects need plural verbs.
2. Use the correct preposition with common verbs. For example, “depend on” not “depend of.”
3. Know the difference between “its” (possession) and “it’s” (it is). This is one of the most frequent errors.
4. Do not confuse “your” (possession) with “you’re” (you are). Read your sentence aloud to check.
5. Use the right tense for time expressions. For example, “yesterday” requires past tense, not present perfect.
6. Remember that “much” is for uncountable nouns, “many” for countable nouns. “Much water” but “many bottles.”
7. Avoid double negatives. “I don’t have nothing” should be “I don’t have anything.”
8. Use “who” for people and “which” for things. “The woman who called” but “the book which I read.”
9. Do not split infinitives unnecessarily. While not always wrong, “to quickly go” is often better as “to go quickly.”
10. Keep your tenses consistent in a sentence or paragraph. Do not switch from past to present without a reason.

How to Use These Fixes

Follow these steps to improve your grammar:

1. Identify your most common mistake. Keep a small notebook or a note on your phone.
2. Learn the rule for that mistake. Use this blog post or a grammar book.
3. Write 3–5 practice sentences using the correct form.
4. Read your sentences out loud. Your ear often catches errors your eyes miss.
5. Ask a friend or teacher to check your writing for that specific mistake.

For example, if you often confuse “affect” (verb, to influence) and “effect” (noun, a result), write: “The weather will affect our plans.” “The effect of the rain was a delay.” Practice until it feels natural.

Examples in Sentences

• She doesn’t like coffee, but she likes tea. (subject-verb agreement)
• I depended on my friend for help. (correct preposition)
• The cat licked its paw. (possession, no apostrophe)
• It’s raining outside. (contraction of “it is”)
• Is this your jacket? (possession)
• You’re going to love this movie. (contraction of “you are”)
• I saw him yesterday, so I used past tense. (tense consistency)
• How much sugar do you want? (uncountable noun)
• How many apples are in the bowl? (countable noun)
• I didn’t see anything wrong. (not “didn’t see nothing”)
• The man who helped me was kind. (person)
• The car which broke down was old. (thing)
• He decided to leave quickly. (avoid split infinitive)
• Last week, she visited her grandmother. (past tense for “last week”)
• They have lived here since 2018. (present perfect for ongoing action)

Common Mistakes

• Mistake 1: Its vs. It’s
  ❌ The dog wagged it’s tail.
  ✅ The dog wagged its tail. (possession)
• Mistake 2: Your vs. You’re
  ❌ Your the best friend I have.
  ✅ You’re the best friend I have. (contraction)
• Mistake 3: Then vs. Than
  ❌ She is taller then me.
  ✅ She is taller than me. (comparison)
• Mistake 4: Double negatives
  ❌ I don’t have no money.
  ✅ I don’t have any money.
• Mistake 5: Me vs. I
  ❌ Me and John went to the store.
  ✅ John and I went to the store. (subject position)

Quick Summary

• Check subject-verb agreement: “He goes” vs. “They go.”
• Use “its” for possession, “it’s” for “it is.”
• Use “your” for possession, “you’re” for “you are.”
• Use “than” for comparisons, “then” for time.
• Avoid double negatives: “I don’t have anything” not “I don’t have nothing.”
• Use “who” for people, “which” for things.
• Keep your tenses consistent in a sentence.
• Use “much” with uncountable nouns, “many” with countable nouns.
• Use “me” as an object, “I” as a subject.
• Practice each mistake one at a time.

Practice Exercises

Fill in the blanks with the correct word or form.

1. The dog wagged ______ tail. (its / it’s)
2. ______ going to love this cake. (Your / You’re)
3. She is smarter ______ him. (then / than)
4. I don’t have ______ to wear. (nothing / anything)
5. ______ and Sarah are coming to dinner. (Me / I)

Answers:

1. its
2. You’re
3. than
4. anything
5. I

Conclusion

Mastering these 10 common English grammar mistakes will instantly improve your writing and speaking confidence. Remember, nobody becomes perfect overnight—practice a little every day, and soon these rules will feel automatic. Bookmark this page and come back whenever you need a quick reminder!

FAQ

1. Why do I keep making the same grammar mistakes?

It is normal to repeat mistakes because your brain has learned a wrong pattern. The best way to fix this is to focus on one mistake at a time. Write it down, practice correct sentences daily, and ask someone to check your work. After a few weeks, the correct form will start to feel natural.

2. Is it okay to use “they” as a singular pronoun?

Yes, using “they” as a singular pronoun (for one person whose gender is unknown or non-binary) is now widely accepted in both spoken and written English. For example: “Someone left their bag. I hope they come back for it.” It is grammatically correct and avoids assumptions about gender.

3. What is the best way to learn grammar rules?

Reading and listening to correct English is very helpful. Try reading short articles, watching videos with subtitles, and keeping a grammar notebook. Also, write short sentences using new rules and say them out loud. Practice makes the rules stick in your memory.

4. How can I remember the difference between “affect” and “effect”?

A simple trick: “Affect” is usually a verb (A for Action). “Effect” is usually a noun (E for End result). For example: “The news will affect my mood.” “The effect of the news was sadness.” If you can replace the word with “result,” use “effect.” If you can replace it with “influence,” use “affect.”