10 Common English Grammar Mistakes and How to Fix Them

Common Grammar Mistakes and How to Avoid Them

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Common Grammar Mistakes and How to Avoid Them

Grammar is super important for good communication, but it can be a big challenge for both learners and native speakers.

Whether you’re sending a work email, posting on social media, or writing a school paper, steering clear of common grammar mistakes is key to making sure your message is understood and makes an impact.

In this post, we’ll look at some of the most common grammar errors and share helpful tips to help you avoid them.


Why Grammar Matters

Grammar is more than just a set of rules; it’s the structure that supports language.

Poor grammar can:

  • Miscommunicate your message.
  • Undermine your credibility.
  • Leave a negative impression on readers or listeners.

By improving your grammar, you enhance your ability to express ideas effectively and confidently.


1. Subject-Verb Agreement Errors

The Mistake
One of the most common grammar mistakes is mismatching the subject and verb.

This happens when the verb does not agree in number with the subject.

For example:

  • Incorrect: The list of items are on the desk.
  • Correct: The list of items is on the desk.

Why It Happens
The confusion often arises when the subject is separated from the verb by a phrase or clause.

How to Avoid It

  • Identify the subject of the sentence and make sure the verb agrees with it in number.
  • Simplify the sentence to check the agreement: The list is…

2. Misplaced or Dangling Modifiers

The Mistake
Modifiers are words or phrases that describe something in the sentence.

When placed incorrectly, they can lead to confusion:

  • Incorrect: Walking down the street, the flowers were beautiful.
  • Correct: Walking down the street, I noticed the beautiful flowers.

Why It Happens
The subject of the modifier is unclear or missing.

How to Avoid It

  • Place the modifier next to the word it’s describing.
  • Ensure the subject is clearly stated.

3. Pronoun-Antecedent Agreement

The Mistake
Pronouns must agree with their antecedents in number and gender:

  • Incorrect: Each student must bring their book.
  • Correct: Each student must bring his or her book.

Why It Happens
This mistake often occurs when trying to use gender-neutral language.

How to Avoid It

  • Use plural forms: All students must bring their books.
  • Rewrite the sentence to avoid pronoun usage altogether.

4. Run-On Sentences and Comma Splices

The Mistake
Run-on sentences occur when two independent clauses are joined without proper punctuation.

For example:

  • Incorrect: I love to write it is my passion.
  • Correct: I love to write, and it is my passion.

Why It Happens
Writers often forget to separate independent clauses or misuse commas.

How to Avoid It

  • Use a period or semicolon to separate clauses.
  • Add a coordinating conjunction (and, but, or, so, yet).

5. Incorrect Use of Apostrophes

The Mistake
Apostrophes are often misused in contractions and possessives:

  • Incorrect: The cat chased it’s tail.
  • Correct: The cat chased its tail.

Why It Happens
Confusion arises because it’s means it is while its is possessive.

How to Avoid It

  • Remember the rule: It’s = It is or It has. Its shows possession.
  • Double-check contractions and possessives for accuracy.

6. Confusing Homophones

The Mistake
Homophones are words that sound the same but have different meanings and spellings.

Common examples include:

  • Their, there, they’re
  • Your, you’re
  • To, too, two

Why It Happens
The similarity in pronunciation can make it difficult to choose the correct word.

How to Avoid It

  • Memorize common homophones and their meanings.
  • Proofread carefully to ensure the correct word is used.

7. Overusing Passive Voice

The Mistake
While passive voice isn’t grammatically incorrect, it can make writing less engaging:

  • Passive: The book was read by the boy.
  • Active: The boy read the book.

Why It Happens
Writers sometimes default to passive voice to avoid specifying the subject.

How to Avoid It

  • Aim for active voice to make your sentences direct and lively.
  • Identify the subject performing the action and place it at the beginning of the sentence.

8. Incorrect Placement of Commas

The Mistake
Misplaced or missing commas can change the meaning of a sentence:

  • Incorrect: Let’s eat Grandma.
  • Correct: Let’s eat, Grandma.

Why It Happens
Writers often struggle with where to place commas.

How to Avoid It

  • Use commas to separate elements in a list, after introductory elements, and to set off non-essential information.
  • Read the sentence aloud; a natural pause often indicates where a comma is needed.

9. Improper Use of Quotation Marks

The Mistake
Quotation marks are often misused, especially with punctuation:

  • Incorrect: She said, “I love grammar”.
  • Correct: She said, “I love grammar.”

Why It Happens
Different style guides have varying rules for punctuation with quotation marks.

How to Avoid It

  • In American English, periods and commas go inside quotation marks.
  • In British English, punctuation placement depends on logic.

10. Splitting Infinitives

The Mistake
Splitting an infinitive involves placing a word between “to” and the verb:

  • Incorrect: To boldly go where no one has gone before.
  • Correct: To go boldly where no one has gone before.

Why It Happens
Writers split infinitives to add emphasis or sound poetic.

How to Avoid It

  • Rearrange the sentence to keep the infinitive intact, unless the split enhances clarity or style.

11. Mixing Up Tenses

The Mistake
Switching between past, present, and future tenses inappropriately:

  • Incorrect: She was cooking dinner when he arrives.
  • Correct: She was cooking dinner when he arrived.

Why It Happens
Writers lose track of time references in the sentence.

How to Avoid It

  • Maintain consistency in tense throughout the sentence or paragraph.
  • Review the context to ensure correct tense usage.

12. Misusing Prepositions

The Mistake
Prepositions can be tricky, leading to errors like:

  • Incorrect: She is good in math.
  • Correct: She is good at math.

Why It Happens
Different languages and regional variations influence preposition usage.

How to Avoid It


13. Failing to Use Parallel Structure

The Mistake
Parallel structure means keeping a consistent pattern in a list or series:

  • Incorrect: She likes hiking, to swim, and running.
  • Correct: She likes hiking, swimming, and running.

Why It Happens
Writers may not notice inconsistencies in structure.

How to Avoid It

  • Ensure all elements in a series follow the same grammatical form.
  • Check lists and comparisons for consistency.

14. Using Double Negatives

The Mistake
Double negatives create confusion and make sentences ungrammatical:

  • Incorrect: I don’t need no help.
  • Correct: I don’t need any help.

Why It Happens
Some dialects use double negatives as a form of emphasis.

How to Avoid It

  • Replace the second negative with a positive term.
  • Practice writing positive sentences to reinforce the habit.

15. Misusing Colons and Semicolons

The Mistake
Colons and semicolons are often interchanged or misused:

  • Incorrect: I have three hobbies; reading: cooking, and hiking.
  • Correct: I have three hobbies: reading, cooking, and hiking.

Why It Happens
The functions of colons and semicolons are not always clear.

How to Avoid It

  • Use a colon to introduce a list or explanation.
  • Use a semicolon to connect closely related independent clauses.

Tips for Avoiding Grammar Mistakes

  1. Proofread Your Work
    Review your writing for common errors before submitting or publishing.
  2. Use Grammar Tools
    Leverage tools like Grammarly, Hemingway, or ProWritingAid to catch mistakes.
  3. Learn the Rules
    Invest time in studying grammar basics. Understanding the rules helps prevent mistakes.
  4. Read Regularly
    Reading well-written material improves your grammar intuitively.
  5. Practice Writing
    Write daily to build confidence and reduce errors over time.
  6. Seek Feedback
    Share your writing with others and ask for constructive feedback.
  7. Take a Grammar Course
    Enroll in an online course to strengthen your skills.

Conclusion

Learning grammar is a continuous process, but if you keep practicing and stay mindful, you can steer clear of typical mistakes.

By recognizing common grammar errors and knowing how to correct them, you’ll enhance your communication skills and leave a strong impact on your audience.

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