you must not speak to the driver
You could take the 5 o'clock train
He couldn't finish in time
You don't need to get up at dawn
you should have bought the trainers
May/Can we sit down
You might be joking
He may have felt embarrassed when he saw her
It was too dark I could not see
She may become the new television star
can he swim
You don't have to come we can do without you
I know whe we should invite but I don't know where he lives
