1、新課標人教版課件系列高中英語選修(模塊）6-3.1The fourth periodLearning about language-grammar教學it的用法1.做形式主語It可以用作先行詞作為句子的主語，而把句子的真正主語移到后面去，可以移到后面的主語是：（1）不定式。 句子的謂語可以是 be+形容詞；e.g. It is important to know your limitations.知道自己的局限性是很重要的。 be+名詞；e.g. It is a good idea to have a little notebook handy.手邊有個小筆記本是個好主義。be+介詞短語；e.

2、g. It is against the law to do that.這樣做是違法的。其他類型的謂語e.g. It gives me great pleasure to see the movie.觀看電影讓我很高興。（2）動名詞用no good,no use,great fun,a new experience等名詞作表語；e.g. It is fun working for him.為他工作很有意思。也可用某些形容詞作表語；e.g. Do you think it is worthwhile quarrelling with him？你認為和他吵值得嗎？一些其他的謂語形式。e.g. Do

3、es it matter wasting a little money稍微浪費一點錢行嗎？（3）主語從句可以是that引導(dǎo)的；e.g. It is strange that it hasnt been noticed before.真奇怪，它以前沒有引起注意。 It is a wonder that he is still alive.他居然還活著，真是個奇跡。 It happened that the harvest was bad that year. 碰巧，那年的收成不好。 It is said that there has an earthquake in Japan.據(jù)說日本發(fā)生了地

4、震。 也可能是wh-詞引導(dǎo)的e.g. It is still a question how many people are to come.多少個人會來，還是個問題。 It is no business of yours where I spend my summer.我在哪兒過夏天，著不關(guān)你的事。 It remains to be seen whether it will do us harm or good.對我們有好處還是有害處，還要等著瞧。 It was clear enough what he meant.他的意思很清楚。2.作形式賓語。 當復(fù)合賓語中的賓語是不定式、動名詞、賓語從句

5、時，往往把賓語放在它的補足語后面，而用it 作形式賓語，放在賓語補足語之前。e.g. I think it no use arguing with him.我認為和他爭吵沒有用。 I found it very interesting to study English.我發(fā)現(xiàn)學英語非常有趣。 He made it clear that he was not interested in this subject.他非常清楚地表示他對那門學科不感興趣。3.用于強調(diào)結(jié)構(gòu) 要強調(diào)句子的某一部分，通常是主語、狀語、賓語，可以把it當作先行詞。這種句子的結(jié)構(gòu)是： “It is/was+被強調(diào)部分+that

6、/who+句子的其他部分”。如果強調(diào)的是人，可以用who,whom代替that。e.g. It is Prof.Lin who teaches us English.（強調(diào)主語） It is English that Prof.Lin teaches us（強調(diào)賓語） It was in shanghai that I saw the film.（強調(diào)狀語）It was in 2001 that I went to university. （強調(diào)狀語）4.用作人稱代詞。 代替前文提到的事物。 e.g. The frog is not a warm-blood animal. Its a col

7、d-blooded one. 5.作為非人稱代詞（1）起指示代詞的作用，指一個人或事物。e.g. who is knocking at the door？ Its me.（2）泛指天氣。e.g. Its a warm sunny afternoon.（3）泛指時間 e.g. It was nearly midnight when she came back.（4）泛指環(huán)境 e.g. It is noisy here.（5）泛指距離 e.g. It is half an hours walk to the city center. 6.用于某些習語make it 及時趕到；成功；辦成 e.g.

8、You can make it if you hurry. 如果你趕快還可以及時趕到。 You neednt worry; he will make it . 你不必擔心，他會辦到的。catch it 被責罵；受處罰e.g. If I come home late Ill catch it from my mother.如果我回家晚了，我媽媽會罵我。 Youll catch it because of your carelessness. 你會因為你的不小心受處罰的。7.It的一些習慣用法How is it with your study？學習好嗎？Thats it .這就對了。It went hard with him.他身遇不幸。It is all over with me.我完蛋了。We must fight it out.我們必須堅持到底。I cant help it.我沒有辦法。Homework1.Fi