Johnny, you      play with the knife; you     hurt yourself.

---Must we donate our pocket money to the poor right now?---No, you _______. You can think it over and do it before Friday.

---There’s someone knocking on the door. Who _________ it be?---It must be John. He promised to be here at 8:00.

You'd better ____ football in the street.

—What do you think we can do for our aged parents?—You ____ do anything except to be with them and be yourself.