Perhaps he left the gate open.
He might have left the gate open. (may)
It is possible that you left your wallet at home.
You might have left your wallet at home. (may)
I'm sure she is at home today.
She must be at home today.
I'm sure Juan isn't Irish.
Juan can't be Irish.
I'm sure the cat is in the house somewhere.
The cat must be at home (in the house)
I'm sure that Susan is not the thief.
Susan can't be the thief.
I'm sure you forgot to do your homework.
You must have forgotten to do your homework.
Did you hear me come in last night? No, I (be) -----asleep.
must have been
I had an umbrella when I came out but I haven't got it now.You (leave) ------------- it on the bus.
might / may / must have left (may )
Emily is crying. She --------------- be sad.
must
Kate is shivering. She ------------- be cold.
must
It is impossible that he is Spanish.
He can't be Spanish.
I’m certain that she is a doctor.
She must be a doctor.
John will probably come to the party. John...
John may come to the party. (might / could)
I'm sure they aren't at work today.
They can't be at work today.
Perhaps he is at school today.
He may be at school today. (might / could)
