Children are apt to make mistakes.

It is important for A to do

I would be delighted to help you with your project.

He is doing time in prison.

How are you doing? Are you ok?

Please do not disturb me while I'm working.

I dare not tell you the truth.

I used to play soccer every weekend.

The president's sudden resignation gave her the unprecedented opportunity to get to do things she had never been allowed to before.