This informal economy, with its recycling-based business model, seems to be doing the city a great service.

I have to do the dishes tonight.

I had to make do with what I had.

I dare not tell you the truth.

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

What do you do for a living?

He is often seen as a ne'er-do-well, but he is actually a talented artist.

I need to do something about this problem.