1) by the time my mother (to come) home i (to do) my homework. 2) while i (to read) yesterday my sister (to cook). 3) she (to clean) the house by the time i (to cook) dinner. 4) she (to say) that she (to go) there next day. 5) when i (to write) a letter my friend (to watch) tv.
1 came,had done
2 was reading,was cooking (cooked)
3 had cleaned,cooked
4 said, would go
5 was writing,was watching (watched)