Intermediate 1 - Past conclusions

Choose 2 options

We use ____ and ____ when we are uncertain about an event.

( there is no evidence to prove it - speculation)

• might / may

• must

• could

• can

Choose 2 options

We use _____ and ____ have + past participle when we feel sure about what happened.

(express possibility and impossibily)

• might / may

• must

• could

• can't

Choose more than one word.

Which words express certainty?

• definitely

• for sure

• if

• surely

• certainly

Choose more than one word.

Which words express uncertainty?

• maybe

• perhaps

• if

• surely

• whether

You _____ seen her, surely! She was standing right in front of you.

• must have

• might have

• can't have

She _____ cleaned the whole house on her own in two hours.

She must have had some help.

• must have

• might have

• can't have

Answer explanation

We use can't have and couldn't have + past participle when we think it's not possible that something happened.

Let's ask at reception to see if they have your keys. Someone _____ found them.

• must have

• might have

• can't have

He _____ gone to Russia. He didn't have a passport.

• must have

• might have

• couldn't have

Oh no! My phone's not in my bag. I _____ left it at home.

• must have

• can have

• couldn't have

It is still a mystery how the robber gained access to the bank.

Police are investigating whether the suspect _____ known one of the employees.

• must have

• may have

• couldn't have