Did they did this work last week? Yes, tney did. (No, they didn't)
Who did this work last week?
When did they this work?
What did they do last week?
They they did this work last week, didn't?
Does Nick like to draw the pictures very much?
What does Nick like to do?
Who does like to draw very much?
tag - ?
They will help us tommorrow
Who will help us tommorrow?
What will they do tommorrow?
When will they help us?
tag - ?