1) had, would go
2) had known, would have gone
3) had missed, would have been
4) knew, would help
5) had forgotten, wouldn't have reminded
6) had had, would have sent
7) knew, would phone
8) would have enjoyed, had been
9) would have been, had walked
10) was, would go
11) had been, would have eaten
12) had got, wouldn't have had
13) would have lost, had sold
14) were, could
15) had asked, would have told
16) had been, wouldn't have played
17) was, wouldn't have
18) hadn't contacted, wouldn't have caught
19) didn't feel, wouldn't smoke
20) had called, would have told
Past Simple - The children drank milk (yesterday).
Past Progressive - The children were drinking milk (while I was brushing my teeth) .
Past Perfect - The children had drunk milk (by the time I came into the kitchen).
Future Simple - The children will drink milk (tomorrow).
Future Progressive - The children will be drinking milk (this time tomorrow).
Future Perfect - The children will have drunk milk (by 8 o`clock).
в скобках даны продолжения предложений для уточнения времени.