江蘇省無錫新領航教育咨詢有限公司高中英語《It作形式主語》練習
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 主語從句，如： 形容詞+主語從句 ，
It is uncertain whether he can come to Jenny’s birthday party or not.
It + be + 形容詞 + （for sb.）+ 動詞不定式 等作表語，
*這類句型常用形容詞 easy, difficult, hard, important, possible，wise 等，
*為了強調不定式動作的執行者， 為了強調不定式動作的執行者，常在不定式前加 for sb， 如：
It’s necessary for the young to master two foreign language.
It is unwise to give the children whatever they want.
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 性格特征的 如：kind, nice stupid, clever, 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：
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.
(3)It + be +名詞詞組 + 動詞不定式，
It is not a good habit to stay up too late.
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：
It’s a pity that you missed the exciting football match. It remains a question whether he will come or not.
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 people were killed in the earthquake.
It is not decided who will give the operation to the patient.
4. It + 不及物動詞(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 didn’t tell the truth.
It happened that I was out when he called.
It + be + 名詞或形容詞 + 動名詞， 這類名詞和形容詞常常是： good, no good, no use,
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.
It + take ( sb. )+ 時間（金錢）+ 動詞不定式，如： 時間（金錢） 動詞不定式，
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.
實戰演練：
4. Is----------- necessary to take off our shoes when we enter the lab?
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
1 ______ he will come is certain.
A What
B That
C Which
D As
2 ______ we need is more time.
A What B that C Why D Which
3 It is a pity ______ he can’t attend our meeting.
A what B that C which D As
4 It's hard to say ______ football team will win the match.
A what B which C why D that
5 _____ he did it is not known.
A Why B Which C What D That
6 My idea is ______ we should help her do housework.
A that B what C why D which
7 The question is _____ we can catch the early bus.
A if B whether C why D what
8 This is _____ he wanted.
A what B which C where D why
9 This is ______ she had a day off. A what B why C which D how
10 I think _______ it is necessary for her to finish the task.
A that B what C which D who
11 Hearing ______ her son was badly wounded, she hurried to the hospital.
A what B that C which D why
12 Our teacher suggested ______ we should try to make changes.
A what B that C which D why 13 Please tell me _____ is the first man to invent a car. A what B which C why D who
14 Show me ______ bus I should take to the city center.
A what B which C why D who
15 I don’t know ______old they are.
A what B how C why D who
16 The news _____China hosted the 2008 Olympic Games successfully is very encouraging.
A that B how C why D who
17 His absence due to the fact ______ he was seriously ill.
A how B which C that D what
18 The suggestion _______ we think it in another way raised a storm of objections.
A what B which C that D why
19 The idea ______ we should help the people in the earthquake-stricken areas is worth praising.
A that B what C why D how
20 He made a promise ______ anyone set him free he would make him very rich.
A that what B if C what D that if
三． 填空題 來填空。 用 what, how, which, when, where, why, whether 來填空。 1 _____ she will leave for Guangzhou is not known.
2 ______ I am going to say has nothing to do with music.
3 ______ one she will choose doesn’t matter much.
4 ______ they were carrying out the experiment has not been decided yet.
5 ______ Kevin is late for the concert is not clear.
6 ______ she will study medicine or computer needs to be discussed.
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 主語從句，如： 形容詞+主語從句 ，
It is uncertain whether he can come to Jenny’s birthday party or not.
It + be + 形容詞 + （for sb.）+ 動詞不定式 等作表語，
*這類句型常用形容詞 easy, difficult, hard, important, possible，wise 等，
*為了強調不定式動作的執行者， 為了強調不定式動作的執行者，常在不定式前加 for sb， 如：
It’s necessary for the young to master two foreign language.
It is unwise to give the children whatever they want.
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 性格特征的 如：kind, nice stupid, clever, 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：
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.
(3)It + be +名詞詞組 + 動詞不定式，
It is not a good habit to stay up too late.
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：
It’s a pity that you missed the exciting football match. It remains a question whether he will come or not.
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 people were killed in the earthquake.
It is not decided who will give the operation to the patient.
4. It + 不及物動詞(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 didn’t tell the truth.
It happened that I was out when he called.
It + be + 名詞或形容詞 + 動名詞， 這類名詞和形容詞常常是： good, no good, no use,
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.
It + take ( sb. )+ 時間（金錢）+ 動詞不定式，如： 時間（金錢） 動詞不定式，
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.
實戰演練：
4. Is----------- necessary to take off our shoes when we enter the lab?
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
1 ______ he will come is certain.
A What
B That
C Which
D As
2 ______ we need is more time.
A What B that C Why D Which
3 It is a pity ______ he can’t attend our meeting.
A what B that C which D As
4 It's hard to say ______ football team will win the match.
A what B which C why D that
5 _____ he did it is not known.
A Why B Which C What D That
6 My idea is ______ we should help her do housework.
A that B what C why D which
7 The question is _____ we can catch the early bus.
A if B whether C why D what
8 This is _____ he wanted.
A what B which C where D why
9 This is ______ she had a day off. A what B why C which D how
10 I think _______ it is necessary for her to finish the task.
A that B what C which D who
11 Hearing ______ her son was badly wounded, she hurried to the hospital.
A what B that C which D why
12 Our teacher suggested ______ we should try to make changes.
A what B that C which D why 13 Please tell me _____ is the first man to invent a car. A what B which C why D who
14 Show me ______ bus I should take to the city center.
A what B which C why D who
15 I don’t know ______old they are.
A what B how C why D who
16 The news _____China hosted the 2008 Olympic Games successfully is very encouraging.
A that B how C why D who
17 His absence due to the fact ______ he was seriously ill.
A how B which C that D what
18 The suggestion _______ we think it in another way raised a storm of objections.
A what B which C that D why
19 The idea ______ we should help the people in the earthquake-stricken areas is worth praising.
A that B what C why D how
20 He made a promise ______ anyone set him free he would make him very rich.
A that what B if C what D that if
三． 填空題 來填空。 用 what, how, which, when, where, why, whether 來填空。 1 _____ she will leave for Guangzhou is not known.
2 ______ I am going to say has nothing to do with music.
3 ______ one she will choose doesn’t matter much.
4 ______ they were carrying out the experiment has not been decided yet.
5 ______ Kevin is late for the concert is not clear.
6 ______ she will study medicine or computer needs to be discussed.
