Fill in the blanks with didn’t and hadn’t.
1. I ............................ thought about this before.
Correct!
Wrong!
Had is followed by a past participle. Did is followed by infinitive without to.
2. She .............................. reply to me.
Correct!
Wrong!
3. Why .......................... you lock the door?
Correct!
Wrong!
4. He ......................... returned yet.
Correct!
Wrong!
5. It .......................... stopped raining.
Correct!
Wrong!
6. They ............................ allow us to enter their premises.
Correct!
Wrong!
7. They .......................... want to wait.
Correct!
Wrong!
8. They ............................... know each other.
Correct!
Wrong!
9. You ......................... eat anything.
Correct!
Wrong!
10. Why ............................ you help when I was in trouble?
Correct!
Wrong!
11. It ......................... take me more than 30 minutes to fix the bike.
Correct!
Wrong!
12. .......................... you hear what I said.
Correct!
Wrong!
Answers
1. I hadn’t thought about this before.
2. She didn’t reply to me.
3. Why didn’t you lock the door?
4. He hadn’t returned yet.
5. It hadn’t stopped raining.
6. They didn’t allow us to enter their premises.
7. They didn’t want to wait.
8. They didn’t know each other.
9. You didn’t eat anything.
10. Why didn’t you help when I was in trouble?
11. It didn’t take me more than 30 minutes to fix the bike.
12. Didn’t you hear what I said?
