Perhaps he left the car unlocked.
He might have left the car unlocked.
It is possible that you forgot your wallet at home.
You might have left your wallet at home.
I'm sure Jane is sleeping now.
Jane must be sleeping.
I'm sure she is at home today.
She must be at home today.
I'm sure Jane isn't late today.
Jane can't be late today.
I'm sure the cat is in the house somewhere.
The cat must be at home.
I'm sure that Susan is not the thief.
Susan can't be the thief.
I'm sure you forgot doing your homework.
You can't have forgotten doing 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 have left
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.
I'm sure they aren't at work today.
They can't be at work today.
