- Are you going out?
- Yes, to the playground. Do you want to come?
- Yes, I do. But I can't.
- Can't you? Why not?
- Because I have to do my homework now.
- Oh, you can do it tomorrow.
- Oh, no! There'll be no time for that tomorrow. I've got to do it today.
- Well, in that case I'll stay at home and help you.
- Thanks. That's very nice of you.