It’s possible that your computer was infected. [MIGHT]
Your computer might have been infected.
It’s highly likely that they had a fight. [MUST]
They must have had a fight.
It looks as if maybe it’s more serious then we thought. [COULD]
It could be more serious than we thought.
Most probably it was John on the phone. [MUST]
It must have been John on the phone.
Perhaps she got lost. [MIGHT]
She might have got lost.
I bet he’s stuck in traffic. [MUST]
He must be stuck in traffic.
I bet you felt terrible! [MUST]
You must have felt terrible!
Wow! I’m sure it was a tempting offer! [MUST]
Wow! It must have been a tempting offer!
It appears his car was stolen, but who knows… [MIGHT]
His car might have been stolen, but who knows…
What? Surely you’re not serious! [CAN’T]
What?!? You can’t be serious!
It’s possible that she flunked the test. [MAY]
She may have flunked the test.
