They might be at home.
Present
If we don't hurry, we could be late.
Present
That dog could be dangerous.
Present
It could be very cold there in winter.
Present
A: Where's John? B: I'm not sure. He might be in the canteen.
Present
They hadn't eaten all day. They must have been hungry.
Past
You look happy. You must have heard the good news.
Past
Where are they? They could have got lost.
Past
She doesn't know the city well. She could have taken the wrong bus.
Past
Bill overslept this morning. He might have worked late.
Past
They might have left while he was sleeping.
Past
