Поставить в правильной форме past simple and past continuous. when i (to ring) up my friend, he (to sleep). when grandfather (to watch) tv, he (to fall) asleep. when my friend (to come) to see me, i (to do) my homework. when i (to go) to the stadium, i (to meet) kate and ann. when nick (to ring) me up yesterday, i (to help) mother.