🟦 Introduction
Do you say “He do his homework” instead of “He does his homework”? Or “She told to me the truth”?
These are examples of common grammar errors — small mistakes that can make a big difference in how your writing or speaking is judged, especially in WAEC exams.
WAEC loves to test your grammar accuracy by:
Giving error-spotting exercises
Asking you to choose the grammatically correct sentence
Testing your knowledge of sentence structure, verb usage, and common confusions
This lesson focuses on the most frequent grammar mistakes and how to fix them.
🟩 Key Concepts and Explanations
🚫 She go to school every day.
✅ She goes to school every day.
Rule: The subject and verb must agree in number and person.
I/we/they go, but he/she/it goes
🚫 He has went to town.
✅ He has gone to town.
Rule: Use the correct verb form. “Has/have” takes the past participle.
🚫 I didn’t see nothing.
✅ I didn’t see anything.
Rule: Avoid using two negatives to express one idea. It makes the sentence incorrect.
🚫 Running down the street, the bag fell off his shoulder.
✅ Running down the street, he dropped the bag from his shoulder.
Rule: Make sure descriptive phrases are close to the words they describe.
🚫 Him and I are friends.
✅ He and I are friends.
Rule: Use subject pronouns for subjects (he, she, I) and object pronouns (him, her, me) for objects.
🚫 She entered the car.
✅ She entered into the car.
✅ She got into the car.
🚫 He married with her last year.
✅ He married her last year.
Rule: Some verbs don’t need prepositions; others do. Learn the correct combination.
| Mistake | Correction | Explanation |
|---|---|---|
| Their / There | Their = possession; There = place | |
| Its / It’s | Its = possessive; It’s = it is | |
| Affect / Effect | Affect = verb; Effect = noun | |
| Then / Than | Then = time; Than = comparison |
🟨 Practice Exercises
Rewrite the sentence with the correct grammar.
The books is on the table.
She didn’t see nobody at the gate.
Me and my brother played football.
He has ate already.
If I was you, I wouldn’t go.
Everyone ______ ready for the trip.
A. are
B. were
C. is
D. have
They ______ the movie before we arrived.
A. has watched
B. had watched
C. have watched
D. watched
I prefer tea ______ coffee.
A. than
B. then
C. over
D. to
She drove carefully ______ avoid an accident.
A. because
B. for
C. to
D. in order
He’s stronger ______ his brother.
A. than
B. then
C. more
D. from
Rewrite each sentence using correct grammar.
There going to school now.
Its a beautiful day.
She don’t like oranges.
The group are arguing loudly.
I can’t hardly believe it.
✅ Answers and Explanations
Exercise 1: Error Correction
The books are on the table.
She didn’t see anybody at the gate.
My brother and I played football.
He has eaten already.
If I were you, I wouldn’t go. (subjunctive mood)
Exercise 2: MCQ
6. C. is – “Everyone” is singular
7. B. had watched – past perfect before another past event
8. D. to – “prefer X to Y” is the correct structure
9. C. to – purpose expression
10. A. than – used for comparison
Exercise 3: Sentence Correction
11. They’re going to school now.
12. It’s a beautiful day.
13. She doesn’t like oranges.
14. The group is arguing loudly. (as one unit)
15. I can hardly believe it. (avoid double negative)
🔁 Recap
You’ve learned:
How to recognize and fix common grammar errors
The importance of subject-verb agreement, verb forms, and correct pronouns
How to avoid double negatives, misplaced modifiers, and confusing words
Key examples often tested in WAEC exams
🪞 Reflection Prompt
Write a paragraph (5–6 lines) about a recent experience (e.g. going to the market or attending a class).
After writing, review and edit it for any grammar errors.
List and explain at least two corrections you made.