1.I can run.
2.I can`t swimming.
3.I could tell a joke.
4.I could`t not help you.
5.I was able to do it.
6.
Shall I close the door?
You should see a doctor.
He wasn't able to ride a bike when he was four.
You mustn't park here.
You needn't finish it today.
She must be Brian's sister.
He might come by train.
You ought to work harder.
Может быть, возможно, наверно