Использовать Past Simple и Past Perfect.
1)When we (to arrive) ... at the theatre, the performance (to start) ... already.
2)I (to do) ... the dishes before we (to go) ... for a walk.
3) Nick (to play) ... tennis yesterday, he (to play) ... never it before.
4) Kate (to make) ... a cake when her parents (to come) ... home.
Условные предложения. Раскрыть скобки.
1)If my friend (to come) .... to see me tomorrow, I (to be) ... very glad.
2)If my mother (to buy) ... a cake, we (to have) ... a very nice tea party.
3)If we (to receive) ... a telegram from him last week, we (not no worry) ...