past simple/past continuous/past perfect
1. when we (to leave) the house it (just/stop) raining and the sun (to shine).
2.i (to look) out of the window. two people (to shout) at each other. they (just/to have) an accident.
3.i (to decide) to have a walk as the weather (to be) great. the birds (to sing) loudly.
4. we (to arrive) at the station. the train (not/to come) yet and a lot of people (to wait) at the platform.