It作形式主语和宾语常见句型
It作形式主语常见句型
动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用it作形式主语，放到句首，常见句型有：
1. It + be + 形容词（clear\ obvious\strange…）+主语从句，如：
It is uncertain whether he can come to Jenny’s birthday party or not.
2. It + be + 名词词组+ 主语从句，这类名词有：
a fact, a pity, a shame, an honour，a question等，如：It’s a pity that you missed the exciting football match.
It remains a question whether he will come or not. 3. It + be + 过去分词+ 主语从句，这类过去分词有：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 + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有：appear, happen, seem等，如：
It seemed that he didn’t tell the truth.
It happened that I was out when he called.
5. It + be + 形容词+ for sb + 动词不定式
这类句型常用形容词easy, difficult, hard, important, possible，wise等作表语，有时候为了强调不定式动作的执行者，常在不定式前加for sb，如：
It’s necessary for the young to master two foreign language s.
It is unwise to give the children whatever they want.
【2011北京卷,25】It’s important for the figures regularly.
A. to be updated
B. to have been updated
C. to update
D. to have updated
6. It + be + 形容词+ of sb. + 动词不定式，这类形容词常是表示心理品质,性格特征的形容词，如：kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。某人和这些形容词可以构成主系表结构。如：
It’s 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 + 名词或形容词+ 动名词，这类名词和形容词常常是：good, no good, no use\harm, a waste of, useless, senseless等，如：
It’s a waste of time talking to her any more.
It is no use arguing about the matter with him.
8. It + take ( sb. )+ 时间（金钱）+ 动词不定式，如：
It took the workers almost three years to finish building the dam.
It will take a whole day to get to the top of the mountain on foot.
实战演练：
1. It is generally considered unwise to give a child —he or she wants. (NMET 1997)
A. however
B. whatever
C. whichever
D. whenever
2. 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. it
3. is a 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. it
5. ________ will take you a lot of time to find him in the crowd.
A. It
B. I
C. We
D. They
6. It is no use his ___ there, the situation is hopeless now.
A. to go
B. to be going
C. going
D. having gone
7. It is never too late to learn, ________?
A. is it
B. isn’t it
C. does it
D. doesn’t it
8. ___________ is known to all that Shenzhou VI Launched Successfully.
A. As
B. What
C. It
D. That
9. _______ is reported in the newspaper,the
Earthquake in east China's Jiangxi Province killed
13 people
A. It
B. As
C. That
D. What
10. ___________ certain that his invention will make people’s life convenient.
A. That’s
B. This is
C. It’s
D. What’s
11. _________ that there is another football match on the air this evening.
A. It says
B. It was said
C. It is said
D. What was said
12. __________ that their daughter got an opportunity to study abroad.
A. It’s a exciting news
B. This is an exciting news
C. This is exiting news
D. It’s exciting news
参考答案：
1——5 BDDDA 6——10CACAC 11——12CD
It作形式宾语
1.find
consider
think + it + adj./ n. + for sb. to do sth.\ that 从句
believe
feel
make
People 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…
….hate\love\like it when….
Practice:
1.小男孩提出这样一个愚蠢的问题是很自然的.
2. 他这么快就离开这里真是遗憾的事.
It is natural for a boy to ask such a silly question.
It is a great pity for him to leave here so soon
3. 我真是愚蠢,居然相信她说的话.
4. 日本队如此轻易获胜, 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. 我们去邀请他参加我们的宴会时, 他竟然走了, 真令人失望.
6. 谁赢得这次竞选和我关系不大.
It is disappointing that he should have left when we went to invite him to our dinner party.
It’ll make no difference to me who will win the election.
7. 他是否来都没关系.reported
It doesn’t matter whether he will come or not.