must have or might have +V3
I'm not sure where Mark is. He (must have/might have go)
He might have gone
not buy
shouldn't have bought
Mt parents are away on vacation. You...see them
....couldn't have seen them
I wonder where my gloves are. I ..... them in the car or maybe in the kitchen.
I might have left them in the car or maybe in the kitchen.
I don't know why Anna hasn't arrived yet. But she (might have/must have take) the wrong bus
But she might have taken the wrong bus
dress up
should have dressed up
The light is still on. They....leave
They couldn't have left
My father knew about the surprise party. Someone ....him about it.
Someone must have told him about it.
These boys look really guilty. The (might have/must have do) something wrong
The must have done something wrong
fill up
should have filled up
I passed all my exams with flying colours. It .....be very difficult
It couldn't have been very difficult
When I got up this morning, the TV was still on in the
living room. You ....... to turn it off.
You must have forgotten to turn it off