ACTIVITY
3: USE OF LANGUAGE
Deductions
about the past:
must have
We use must have + past
participle when we feel sure about what happened.
Who told
the newspapers about the prime minister's plans? It must have been someone
close to him.
might have / may have
We can use might have or may
have + past participle when we think it's possible that something
happened.
I think I
might have left the air conditioning on. Please can you check?
Police think the suspect may have left the country using a fake passport.
May have is more formal than might have. Could have is
also possible in this context but less common.
can't have / couldn't have
We use can't have and couldn't
have + past participle when we think it's not possible that something
happened.
She can't
have driven there. Her car keys are still here.
https://learnenglish.britishcouncil.org/grammar/b1-b2-grammar/modals-deductions-about-past
A)
Choose the
correct option to complete the sentences.