I.1 study/will pass

2 shines/will walk

3 has/will see

4 come/will be

5 earns/will fly

6 travel/will visit

7 wear/will slip

8 forgets/will give 

9 go/will listen

10 wait/will ask

II.1 came/would prepare

2 lived/would visit

3 were/would play

4 were/would visit

5 studied/would be

6 had/would buy

7 did/would earn

8 got/would ask

9 won/would fly

10 met/would ask

III.1 had been/would have played

2 had gone/would have had

3 had learnt/would have written

4 had taken/would have arrived

5 had explained/would have done

6 had waited/would have seen

7 had come/would have arrested

8 had bought/would have tasted

9 had asked/would have emailed

10 had spoken/would have understood

IV.1 had fed

2 would be

3 didn't talk

4 would have had

5 swim

6 would...choose

7 wouldn't have bought

8 will turn

9 had had

10 wouldn't have

11 find

12 had worn

13 don't change

14 would arrive

15 comes

16 had asked

17 leaves

18 won't be

19 had read

20 come

V.1c had had

2a spoke

3c is

4b wouldn't have made

5a would have never believed

6c hadn't agreed

7b he had told me

8a had studied

9c would have called

10a comes

11b need

12d would work

13c were

14b would have gone down

15a had been enough water

16d met

17a had had

18b would go

19c stood

20a I will never mention

VI.1 if I had known it was your birthday I would have sent you a card

2 if my brother had left the car keys I could have picked him up at the station

3 if you didn't drink too much beer you could sleep

4 I wouldn't get wet if I had an umbrella

5 if he had hurried he wouldn't have missed the train

6 if jack hadn't helped me I wouldn't have been able to move this table

7 if you make me some coffee I will give you some sweets

8 if I had had the money I would have bought a new suit

9 if you didn't stop talking you won't understand the lesson

10 if I were very clever I would be a doctor