Put the verbs into Past Continuous, Past Perfect, Past Simple. 1) The Browns ... (leave) for Moscow a month ago. 2) Boys ... (ride) their bikes at 4 oclock yesterday. 3) We ... (arrive) at the theatre before the performance ... (begin). 4) Sam ... (do) his homework from 5 to 6. 5) When I ... (phone), Ann ... already (clean) her parrots cage. 6) The old lady ... (water) the flowers at that time. 7) Tom ... (change) his mind by that time.

1) left
2)rode
3)arrived   began
4)did
5)phoned     cleaned 
6)water
7)changed