Top 15 ESL Grammar Mistakes and Corrections for B1-B2 Learners

Introduction

Making mistakes is a natural part of learning English, but knowing which errors are most common can save you time and frustration. In this post, we break down the top 15 ESL grammar mistakes that B1–B2 learners frequently make—and, more importantly, show you exactly how to fix them. Whether you are writing an email, speaking in class, or preparing for an exam, these corrections will help you sound more natural and accurate.

What Are ESL Grammar Mistakes?

ESL grammar mistakes are errors that English as a Second Language learners often make when using grammar rules. These mistakes usually happen because of differences between a learner’s native language and English, or because of incomplete understanding of English grammar patterns. The good news? Most of these errors follow predictable patterns, so with practice, you can avoid them.

Rules for Avoiding These Mistakes

1. Always match subject and verb in number. A singular subject needs a singular verb; a plural subject needs a plural verb.
2. Use the correct tense for time references. Past events need past tense, habitual actions need present simple, and ongoing actions need continuous forms.
3. Choose prepositions carefully. Prepositions like “in,” “on,” and “at” have specific uses for time and place.
4. Remember articles (a, an, the) are not optional. Countable singular nouns usually need an article or determiner.
5. Do not double-mark negatives. Use only one negative word per clause (e.g., “I don’t have any” not “I don’t have none”).

How to Use These Corrections

Follow these steps to turn mistakes into strong habits:

1. Identify the error type. Read your sentence and ask: Is this a tense problem? A preposition issue? A subject-verb agreement mistake?
2. Check the rule. Refer to the rules above or the examples below to see the correct form.
3. Rewrite the sentence. Practice writing the correction out loud or on paper.
4. Create your own example. Make a new sentence using the correct grammar to reinforce learning.

For instance, if you wrote “He go to school yesterday,” you identify the tense error (past vs. present), check the rule (past events need past tense), rewrite as “He went to school yesterday,” and then create a new sentence like “She went to the park last week.”

Examples in Sentences

Here are 15 corrected sentences with the grammar point in bold:

• She goes to the gym every morning. (subject-verb agreement)
• They have already finished their homework. (present perfect tense)
• I am interested in learning Spanish. (adjective + preposition)
• He doesn’t like coffee. (correct negative form)
• We were waiting for the bus when it started to rain. (past continuous)
• There is a book on the table. (article with singular countable noun)
• She has been studying English for three years. (present perfect continuous)
• I would like to order a pizza. (polite request with “would”)
• Neither the teacher nor the students were late. (subject-verb agreement with “neither…nor”)
• He is taller than his brother. (comparative structure)
• She told me that she would call. (reported speech)
• If I had known, I would have come. (third conditional)
• He enjoys playing tennis. (gerund after certain verbs)
• I am used to waking up early. (adjective “used to” + gerund)
• They have been living in London since 2019. (present perfect continuous with “since”)

Common Mistakes

Here are five frequent errors and their corrections:

• Mistake 1: Subject-verb agreement
  ❌ He go to school every day.
  ✅ He goes to school every day.
• Mistake 2: Wrong tense
  ❌ Yesterday I go to the store.
  ✅ Yesterday I went to the store.
• Mistake 3: Missing article
  ❌ I saw dog in the park.
  ✅ I saw a dog in the park.
• Mistake 4: Double negative
  ❌ I don’t have none money.
  ✅ I don’t have any money.
• Mistake 5: Wrong preposition
  ❌ She is good on math.
  ✅ She is good at math.

Quick Summary

• Always match subject and verb in number.
• Use the correct tense for the time you mean.
• Include articles (a, an, the) with singular countable nouns.
• Avoid double negatives—use only one negative word.
• Learn common preposition combinations (e.g., good at, interested in).
• Practice each correction by writing your own sentences.

Practice Exercises

Fill in the blanks with the correct grammar form. Answers are below.

1. She __________ (go) to the library every Saturday.
2. They __________ (not finish) their project yet.
3. I am interested __________ learning French.
4. He __________ (be) taller than his sister.
5. There __________ (be) a cat under the table.

Answers:

1. goes
2. have not finished / haven’t finished
3. in
4. is
5. is

Conclusion

Mastering these 15 common ESL grammar mistakes will immediately improve your writing and speaking accuracy. Remember, making mistakes is part of learning—the key is to recognize them and practice the correct forms. Keep reviewing these patterns, and soon they will become second nature. Happy learning!

FAQ

1. Why do ESL learners make these specific grammar mistakes?

ESL learners often make these mistakes because of direct translations from their native language. For example, many languages do not use articles (a, an, the) the same way English does, or they have different rules for verb tenses. Additionally, English has many irregular verbs and specific preposition combinations that take time to memorize.

2. How can I remember to use articles correctly?

A good strategy is to learn nouns together with their articles. For instance, memorize “a book,” “an apple,” “the sun.” Also, remember the basic rule: use “a” before consonant sounds, “an” before vowel sounds, and “the” when referring to something specific or already known. Practice by reading English texts and noticing how articles are used.

3. What is the best way to practice subject-verb agreement?

Try this simple exercise: write 10 sentences about your daily routine, making sure the verb matches the subject. For example, “I wake up at 7 AM” and “She wakes up at 8 AM.” Then, change the subject to plural (e.g., “They wake up”) and notice the change. Regular writing practice and reading aloud also help you hear the correct forms.

4. How long does it take to stop making these mistakes?

There is no fixed timeline, but with consistent practice, many B1–B2 learners see improvement within 3–6 months. The key is to focus on one or two mistake types at a time, practice daily, and get feedback from teachers or language partners. Mistakes are normal—what matters is your willingness to learn from them.