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人教课标版
高二选修6
Unit 4
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I. 代词 it
a. 用作人称代词, 代替前文提到的事物。
My watch is missing. I can’t find (it) anywhere.
Her father has gone abroad. Have you heard about (it)?
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b. 代替指示代词this, that。
What’s this? (It’s) a computer.
Whose pen is that? It’s mine.
c. 表示时间、天气、距离、季节、明暗等。
It’s time for lunch.
It’s getting warmer and warmer.
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It’s forty years since my hometown was liberated.
It’s summer now.
How far is it from here to the airport?
It’s about twenty minutes’ walk from here to the bus stop.
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II. 引导词:
a. 作形式主语, 代替由不定式, 动名词或从句表示的真正主语。其基本句型为:
It (形式主语) +adj. + to+ v.
It (形式主语) +adj. + that (subject (主语)+v. )
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It (形式主语)+adj.+ whether (subject +v.)
It is +adj.+for/sb. to do sth. (of )
It+seems (appears)+that (subject +v.) happens
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① It is very important to help each other.
② It is no use / useless going there again.
③ It’s not decided yet when they will leave for Shanghai.
④ It seems that he has caught a cold. =He seems to have caught a cold.
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⑤ Is ____ possible to master a foreign language in two months? A. now B. that C. it D. man
⑥ Is ____ necessary to tell his father the truth?
A. it B. that C. what D. he
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b. 作形式宾语, 代替由不定式、动名词或从句表示的真正宾语。其主要基本句型为:
主语+谓语+it (形式宾语)+宾语补足语+to do sth. (doing sth. 或that从句).
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① Marx found it important to study the situation in Russia.
② She thought it no use to write to him again.
③ They want to make it clear to the public that they do an important and necessary job.
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④ Do you think ___ difficult to work out this maths problem?