=>
1. had visited/ would have been

2. would have been/had walked

3. could have gone/ hadn't got sick

4. hadn't failed

5. had driven/wouldn't have happened

6. would have forgotten/hadn't reminded

7. would have passed

8. hadn't ignored/ wouldn't have got into

9. had told/would have never done

10. wouldn't have invited/ had known

11. wouldn't have got wet/had remembered

12. had gone/ would have become

13. wouldn't have done/hadn't revised

14. had had/wowuld have took 

15. wowuld have had / hadn't spent

1, had visited-would have been

2, would have been-had walked

3, could have gone-hadn't got sick

4, hadn't failed

5, had driven-wouldn't have happened

6, would have forgotten-hadn't reminded

7, would have passed

8, hadn't ignored-wouldn't have got into

9, had told-would have never done

10, wouldn't have invited-had known

 mk buồn ngủ nên làm đc từng này thôi mong bn bỏ qua