Modal verbs of deduction in the past

Unscramble this modal verb:

u t s m

What of the following verbs are modal verbs?

• Can - Should - Could - Must - May

• Can - Could - eat -got

• Should - Can - Must

• Should - be - could - may - get

Last summer I took four exams and failed them all!

- You__________________ been very disappointed.

• mustn't have

• might have

• may have

• must have

We agreed to meet yesterday but when I got there I didn't see him. He____________________ waiting elsewhere.

• might have / may have

• must have/ should have

• have to have/ would have

Talking about modals of deduction, the opposite of -must- is?

• can't

• might

• could

Rihanna is rich. I'm sure she didn't steal the necklace.

• She can't have stolen the necklace.

• She must have stolen the necklace.

• She may have stolen the necklace.

• She should have stolen the necklace.

Choose the correct option

If I'm 100% sure that something happened in the past

• It may have happened

• It must have happened

• It could have happened

Choose the correct option

If I'm 100% sure that something DID NOT happen in the past. It´s impossible.

• It may have happened

• It could have happened

• It couldn't have happened

• It can't have happened

Choose the correct option

If something POSSIBLY happened in the past.

• It may have happened

• It might have happened

• It must have happened

• It musn't have happened

Their plane was delayed and they had to wait 36 hours in the airport.

B: They _________________ been very happy with the airline.