第1个回答 2011-03-21
Ⅰ.动名词和不定式做主语的相同点
1.不定式短语和动名词做主语时，常常为了保持句子的平衡，用it来做形式主语，如：
It is not easy to learn English well.
It is no use asking him for help.
2.如果主语用了不定式,表语和宾语也要用不定式;主语用了动名词,表语和宾语也要用动名词,这在英语中称为对称性,如:
To see is to believe. = Seeing is believing. (眼见为实)
(85)It is better to stay home than _A__ out.
A. to go B. going C. go D. gone
Ⅱ.动名词和不定式做主语的不同点
1.不定式做主语常表示具体的某一动作;表示泛指或一般的抽象的概念时,多用动名词,如:
(92)_B_ is a good form of exercise for both young and old.
A. The walk B. Walking C. To walk D. Walk
2.在”There/It +be+ no use(good/help/need)”之后常用动名词做主语,而少用不定式,如:
It /There is no use crying over the split milk.
It /There is no help taking this medicine.
★但是如果该句型中用了for引出不定式的逻辑主语,就只能用不定式,如:
(93) There is no good for us to do that exercise.
3.不定式可以和when, where, how, what, whether等连用,在句子中做主语,宾语和表语,而动名词则不能,如:
How to solve the problem is a hot potato.
Where to put the box seems hard to decide.
Whether to do it hasn’t been decided.
What to do next is up to you.
第2个回答 2011-03-21
有关不定式和动名词的填空练习：
1. __________ a language requires time and effort.
A. Learn B. Learning C. To learn D. Being learned
2. It is not always easy __________ invitations.
A. to refuse B. refusing C. to be refused D. being refused
3. __________ now seems impossible.
A. Saving money B. To save money C. Being saved money D. To be saved money
4. To answer correctly is more important than __________
A. a quick finish B. to finish quickly C. finishing quickly D. you finish quickly
5. How __________ the problem will be discussed at tomorrow’s meeting.
A. to solve B. to be solved C. being solved D. solving
6. It was polite _________ the child to give up his seat to the elderly woman.
A. for B. of C. to D. with
7. Is it necessary __________ the book immediately?
A. for him to return B. that he returns C. his returning D. of him to return
8. It __________ forty-five minutes __________ there by bus.
A. cost, to get B. takes, getting C. takes, to get D. takes, to get to
9. It is no good __________. You should give_________.
A. to smoke, it up B. smoking, it up C. smoking, up it D. to smoke, up it
10. It is no __________ debating with Tom, because he will never change his mind.
A. use B. help C. time D. while
11. Do you consider it any good __________ again?
A. to try B. try C. trying D. for you to try
12. I don’t think it’s much good __________ to him.
A. writing B. to write C. to be written D. being written
13. __________ the assignment made his father lose his temper.
A. The boy’s not having done B. The boy not having done
C. The boy’s having not done D. The boy having not done
14. I don’t remember __________ about it.
A. him telling us B. his telling us C. him to tell us D. he tells us
15. Her wish is __________ an engineer.
A. becoming B. become C. to become D. being come
16.Some people’s greatest pleasure is __________.
A. fishing B. to fish C. to be fishing D. being fish
17. The report was so __________ that they were all __________.
A. inspiring, exciting B. inspiring, excited C. inspired, excited D. inspired, exciting
18. ---“You look pale.” ---“I feel a little __________.”
A. tire B. tired C. tiring D. tiresome
19. He seems __________ here for three years.
A. to be living B. to have lived C. to have been lived D. to live
20. ---“What’s made you so upset?”
---“_________ three tickets to the pop music concert.”
A. Lost B. Losing C. Because of losing D. Since I lost
答案：
1-5 BABBA 6-10 BACBA 11-15 CAABC 16-20 ABBBB