They wouldn't have reached the agreement so easily without that common ground.

She wasn't feeling very well. Otherwise she wouldn't have left the meeting so early

要点归纳：

_____________________________________________________________________________

________________________________________________________________________.

【习题链接】：

1. Without heat and sunlight, plants on the earth ______ well.

A. would not grow B. will not grow C. had not grown D. would not be grown

2. But for my classmates' help, I _____ the work in time.

A. did not finish B. could not finish C. will not finish D. would not have finished 3. 3. But for the rain, we _____ a nice holiday.

A. should have B. would have had C. would have D. will have had

当堂检测

1．"It is high time that we generation gap between young and old." said British Queen Elizabeth Ⅱwhen delivering her Christmas message yesterday.

　　A．have bridged B．bridge C．bridged D．will bridge

　　3. I am sorry that he _______ in such poor health.

　　 A. are B. shall be C. were D. should be

　　4. That is a good book. You ________ it yesterday.

　　 A. could buy B. should buy C. should have bought D. bought

　　5. If only I ________ to the lecture!

　　 A. listen B. will listen C. am listening D. had listened

　　6. Without electricity, human life ______ quite different today.

　　 A. is B. will be C. would have been D. would be

　　7. He _______ you more help, even though he was very busy.

　　　A. might have given B. might give C. may have givenD. may give

　　8. Mike's father, as well as his mother, insisted that he ______ home.

　　 A. stayed B. could stay C. has stayed D. stay

　　9. Mr. Smith insisted that he ______ the work all.

　　　A. had done B. have done C. did D. so

　　10. It is important that we ________.

　 A. shall close the window before we leave

B. will close the window before we leave

C. must close the window before we leave

D. close the window before we leave