It作形式主語和賓語常見句型

1、It作形式主語常見句型動詞不定式，動名詞或主語從句作主語時，通常把它們放在謂語動詞前，而用it作形式主語，放到句首，常見句型有：1. It + be + 形容詞（clear obviousstrange）+主語從句，如：It is uncertain whether he can come to Jennys birthday party or not.2. It + be + 名詞詞組 + 主語從句，這類名詞有：a fact, a pity, a shame, an honour，a question等，如：Its a pity that you missed the exciting fo

2、otball match.It remains a question whether he will come or not. 3. It + be + 過去分詞 + 主語從句，這類過去分詞有：announced, believed, expected, hoped, decided, reported, said, shown等， 如：It is reported that 16 people were killed in the earthquake.It is not decided who will give the operation to the patient.4. It + 不

3、及物動詞(seem, appear, happen等) + 主語從句, 這類不及物動詞有：appear, happen, seem等， 如：It seemed that he didnt tell the truth.It happened that I was out when he called.5. It + be + 形容詞 + for sb + 動詞不定式這類句型常用形容詞easy, difficult, hard, important, possible，wise等作表語，有時候為了強調(diào)不定式動作的執(zhí)行者，常在不定式前加for sb，如：Its necessary for the

4、young to master two foreign language s.It is unwise to give the children whatever they want.【2011北京卷,25】Its important for the figures regularly.A. to be updated B. to have been updated C. to update D. to have updated6. It + be + 形容詞 + of sb. + 動詞不定式，這類形容詞常是表示心理品質(zhì),性格特征的形容詞，如：kind, nice stupid, clever

5、, foolish, polite, impolite, silly, selfish, considerate等。某人和這些形容詞可以構成主系表結構。如：Its very kind of you to help me with the work.=You are kind to help me.It seemed selfish of him not to share his dictionary with others.=He seemed selfish not to share his dictionary with others.7. It + be + 名詞或形容詞 + 動名詞，這

6、類名詞和形容詞常常是：good, no good, no useharm, a waste of, useless, senseless等，如：Its a waste of time talking to her any more.It is no use arguing about the matter with him.8. It + take ( sb. )+ 時間（金錢）+ 動詞不定式，如：It took the workers almost three years to finish building the dam.It will take a whole day to get t

7、o the top of the mountain on foot.實戰(zhàn)演練：1. It is generally considered unwise to give a child he or she wants. (NMET 1997)A. however B. whatever C. whichever D. whenever2. In fact is a hard job for the police to keep order in an important football match. (2001 上海)A. this B. that C. there D. it3. is a

8、fact that English is being accepted as an international language. (NMET1995)A. There B. This C. That D. It 4. Is necessary to take off our shoes when we enter the lab? (MET88) A. everyone B. this C. her D. it5. _ will take you a lot of time to find him in the crowd. A. It B. I C. We D. They6. It is

9、no use his _ there, the situation is hopeless now. A. to go B. to be going C. going D. having gone7. It is never too late to learn, _? A. is it B. isnt it C. does it D. doesnt it8. _ is known to all that Shenzhou VI Launched Successfully. A. As B. What C. It D. That 9. _ is reported in the newspaper

10、, the Earthquake in east China's Jiangxi Province killed 13 people A. It B. As C. That D. What10. _ certain that his invention will make peoples life convenient. A. Thats B. This is C. Its D. Whats11. _ that there is another football match on the air this evening. A. It says B. It was said C. It

11、 is said D. What was said12. _ that their daughter got an opportunity to study abroad. A. Its a exciting news B. This is an exciting news C. This is exiting news D. Its exciting news參考答案：15 BDDDA 610CACAC 1112CDIt作形式賓語1. find consider think + it + adj./ n. + for sb. to do sth. that 從句 believe feel m

12、akePeople felt it impossible for man to fly into outer space some years ago.I consider it a shame that we have lost the game.2.appreciate it if. .make it clear that.hatelovelike it when.Practice: 1.1.小男孩提出這樣一個愚蠢的問題是很自然的.2. 他這么快就離開這里真是遺憾的事.It is natural for a boy to ask such a silly question.It is a great pity for him to leave here so soon3. 我真是愚蠢,居然相信她說的話.4. 日本隊如此輕易獲勝, 真出乎意料.It was stupid of me to believe what she said.It is surprising that Japanese team won the match so easily.5. 我們?nèi)パ埶麉⒓游覀兊难鐣r, 他竟然走了, 真令人失望.6. 誰贏得這次競選和我關系不大.It i