**Making Deductions: Tenses of the Infinitive**
**Part 1: Write the corresponding form of the infinitive**
1. (to) write
2. (to) be believed
3. (to) talk
4. (to) arrive
5. (to) have cleaned
6. (to) be ironing
7. (to) have slept
8. (to) be made
9. (to) have cooked
10. (to) be built
*Part 2: Fill in may/might, must, or can't*
1. Kelly's hair looks fantastic. She **must** have dyed it.
2. Dave **must** be on holiday. He's still not home.
3. I saw James leave the burning building. He **must** be the person who started the fire.
4. Jill **must** have invited Fiona to her party.
5. They don't speak to one another. They **must** have left together as I saw them get into the same car.
6. It **might** rain this afternoon as it's very cloudy.
7. I went to Sam's house, but nobody was there. He **must** have gone to the office.
8. Look! The door's unlocked. Susan **can't** have forgotten to lock it.