英语语法探究

　　c. not be watching d. have not watched

　　6. My father did not go to New York, the doctor suggested that he ______ there.

　　a. not to go b. won't be

　　c. not go d. not go to

　　7.I demanded that the students each ______ a plan for the summer vacation.

　　a. would make b. will make c. make d. made

　　8. It is surprising enough that such a horrible thing ____ there.

　　a. happened b. will happen

　　c. should happen d. has happened

　　9. It was urgent that she ______ the master immediately.

　　a. call b. calls c. called d. would call

　　10. He looks as if he _____ nothing about it before.

　　a. knows b. had known

　　c. has known d. wouldn't know

　　11.My idea is that we ______ the challenge.

　　a. ought accept b. will accept

　　c. accept d. are accepted

　　12. The sun rises in the east and sets in the west, so it seems as if the sun ______ round the earth.

　　a. is circling b. has circled

　　c. should circle d. were circling

　　13. It was suggested at the meeting that effective measures _______ to solve the problem.

　　a. be taken b. must be taken

　　c. were taken d. take

　　14. It's advisable that he ______ with a clearly defined goal in mind.

　　a. must go b. go c. will go d. goes

　　15.It seemed as if all of sudden the animal _____ danger in the air.

　　a. has smelt b. had smelt

　　c. smelt d. would smell

　　16.It is better that the book ______ on the low stool.

　　a. put b. puts

　　c. should be put d. be put

　　17.He moved that the report ______.

　　a. should accept b. should be accepted

　　c. be accept d. would be accepted

　　18.The professor gave orders that the test ______ before 5:30.

　　a. be finished b. will be finished

　　c. will finish d. shall finish

　　19.It's time he ______ something for his coming examination.

　　a. do b. does c. will do d. did

　　20.It was essential that all the necessary documents ______ to the dean's office before Friday.

　　a. be handed in b. must be handed in

　　c. had been handed in d. should hand in

　　21.It is highly desirable that a new president _____ for our institute.

　　a. appointed b. be appointed

　　c. has been appointed d. is appointed

　　22. The government ordered that the pollution problem of this city ______ within six months.

　　a. would solve b. would be solved

　　c. should be solved d. must solve

　　23. It is natural that much research ______ to overcome corrosion.

　　a. should make b. will make

　　c. is made d. should have been made

　　24. It is important that a consultant engineer ______ familiar with modern developments.

　　a. is b. being c. be d. has been

　　25. Since her blood pressure is much higher than it should be, her doctor insists that she _____.

　　a. will not smoke b. is not smoking

　　c. didn't smoke d. not smoke

　　英语语法网：虚拟语气用在条件状语从句中

　　虚拟语气是一种特殊的动词形式，表示所说的话不是一个事实，而只是一种假设，愿望，建议，怀疑，猜测或不大可能实现的空想。

　　I.虚拟语气用在条件状语从句中

　　虚拟语气用在条件状语从句中，通常从句由连词if 引导。

　　1.与现在事实相反的虚拟条件句

　　条件状语从句主句

　　If +主语 +动词过去式主语+ would, should, could, might+原形动词

　　(be的过去式用were)

　　例如：

　　If I feared death, I wouldn't be a communist.

　　(刘胡兰)怕死就不做共产党员。

　　If there were no air, we couldn't live.

　　如果没有空气，我们就不能生活。

　　Example:

　　I would ask George to lend us the money if I ______ him.

　　A. had known B. knew C. have known D. know

　　I _____ it to him if I thought he would understand.

　　A. shall explain B. will explain C. would explain D. explain

　　2.与过去事实相反的虚拟条件句

　　构成

　　条件状语从句主句

　　If + 主语 + 动词过去完成式主语 + would, should, could, might+have + 过去分词

　　例如：

　　If you had come a few minutes earlier, you would have met him.

　　如果你早来几分钟，你就会碰上他。

　　If there had been no air in the tube, the result of the experiment would have been more accurate.