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A. would + have + past participle -------past perfect

2 hadn'

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zero : if ( present --------- present )

first : present -----------will

second : past ----------would

third : past perfect -----------would + have + past participle

a : 2. hadn't taken

3. wouldn't have

4. went

5. would have

6. would have been

7. wouldn't be able to

8. had known

9. had

10. had stayed

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2. we would

3. i had known

4. he didn't get

5. we wouldn't have missed

6. wouldn't get

7. had read

8. didn't have

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.3.you would have had

4. you got lost

5. hadn't kept

6. would have seen

7. would you do

8. didn't have

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past -----------would

past perfect ----------would have past participle