Fill in the blanks with an infinitive with or without to.
1. Don't .......................... that wire.
Correct!
Wrong!
The infinitive is used without to after do, does and did.
2. She didn't allow me .............................. her piano.
Correct!
Wrong!
Use a to infinitive after allow.
3. They didn't let him ...............................
Correct!
Wrong!
Use a bare infinitive after let.
4. You ought .................................. a doctor.
Correct!
Wrong!
Use a to-infinitive after ought.
5. I was unable ............................. his true motives.
Correct!
Wrong!
Use a to-infinitive after unable.
6. I daren't ...............................
Correct!
Wrong!
When dare is a modal auxiliary, it is followed by an infinitive without to.
7. I didn't dare ................................... my mouth.
Correct!
Wrong!
When dare is an ordinary verb, it is followed by an infinitive with to.
8. Don't forget .................................... granny on her birthday.
Correct!
Wrong!
9. They asked us ............................... the room.
Correct!
Wrong!
10. I heard him ................................ it.
Correct!
Wrong!
Hear is followed by an ing form or an infinitive without to.
11. You don't have ................................... rooms in advance.
Correct!
Wrong!
12. They refused .................................. me.
Correct!
Wrong!
Answers
- Don’t touch that wire.
- She didn’t allow me to touch her piano.
- They didn’t let him go.
- You ought to see a doctor.
- I was unable to understand his true motives.
- I daren’t speak.
- I didn’t dare to open my mouth.
- Don’t forget to wish granny on her birthday.
- They asked us to vacate the room.
- I heard him say it.
- You don’t have to book rooms in advance.
- They refused to help me.
