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Book6 Unit 3 A Healthy Life

Book6 Unit 3 A Healthy Life

Period 3 Grammar : The rules of “it”

编写人:严春霞 审稿人:高二英语组 编写时间:________

班级: ________ 组别:_________ 组名:________ 姓名:__________

学习目标:

了解并掌握代词it的各种用法。能熟练运用到各种场合,能够解答与之相关的习题,学会使用it有关的特殊句型尤其是强调句型、it作形式主语。

I. 作人称代词:

1. it可以用来指东西、动物、婴儿和未确定身份的人。

1. Where's my book? Have you seen it?(it代替前面的_________)

2. The dog is in the garden, isn't it? (it代替前面的_________)

3. The baby cried because it is hungry.(it代替前面的_________)

4. (Someone is ringing.)Who's it? It's me.(it代替前面的_________)

2. it 可以指上下文内容

1. The Olympic Game held in Beijing in 2008. It made the Chinese proud . 第二个句子中的it指代的是前面的,代替的是整个。

补充:it与one, that的区别

(1)、it与one的区别:这两个词都可以代表前面说过的名词,但it用于同名同物的场合;one 则用于同名异物的场合。

e.g. ---- Do you still have the bicycle?---- No, I have sold _________.

---- Is this knife yours?

---- No. It is Xiao Zhang’s. Mine is the _____ on the desk.

(2)、it与that的区别:两词都可代替某一特定名词,但that指同一类,并非同一个。

e.g. The climate of South China is mild(温和的); I like ______ very much.(_________指the climate of South China)

The climate of South China is much better than _________ of Japan.(_________指the climate)

II. 用于表达时间,距离,天气、环境等。

It’s half an hour’s walk from here to our school.此处it 指代的是_________.

It’s nice and warm here.But it’s two o’clock now, and it’s time for us to go to school.

此处it分别指代__________, ___________, ____________.

III. 作形式主语

为了使句子平衡,常采用形式主语(或宾语)it ,而把真正的主语(或宾语)置于句子后面。 ①It is +adj.+ ( for sb. ) to do sth.

②It is +adj. + (of sb.) to do sth.

在句型①中,形容词是用来修饰事情的形容词;如important, necessary, natural 或者easy ,safe , common , normal , hard , difficult ,dangerous , unusual, rare , impossible , pleasant等。

如:对她来说参加派对很重要。________________________________________________________.

在句型②中,形容词必须是能表示逻辑主语特征的形容词,常见的有:bad , brave , careless, clever , cruel , foolish ,good (好心的), honest , naughty , nice(有教养的, polite, rude , silly , stupid , wise…

如:你帮助老年人,真是太善良了。_____________________________________________________.

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