Modal of Deduction - Past

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

• must have

• might have

• can't have

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 Japan. He didn't have a passport.

• must have

• might have

• couldn't have

I explained the homework but she did the wrong page. I strongly believe that she _____ misunderstood me.

• must have

• might have

• couldn't have

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

• must have

• might 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

Where's Clare? Her bag's here and her computer's still on so she _____ gone home.

• must have

• may have

• can't have

I can't remember my password! But I _____ written it in my notebook as sometimes I do that.

• must have

• may have

• can't have

He wasn't answering the phone before. Maybe he went to the shop or he _____ been in the shower.

• must have

• can't have

• might have

Sorry, I don't know if she's here or not. She was feeling ill so she _____ gone home.

• must have

• can't have

• might have