高中语法：It的用法总结

Book6 Unit3 Grammar “The Use of It”

备课：单曰坤审核：高二英语2014.12.15

Teaching aims:1. Revise the useful words and expressions.

2. Master the usage of “it”.

Step I. Review the important words and expressions in the reading passage.

Words :

1.香烟，纸烟________________

2.青少年；青春期的__________________

3.自动的，无意识的_______________

4.精神的，智力的________________

5.怀孕的_________________

6.困难的坚硬的________________

7.收回，退回__________________8.结果，效力_______________________

9.离开，停止_____________________ 10.畸形的，异常的___________________

11.气喘吁吁的____________12.加强，巩固______________

13.绝望的，拼命地_____________14.失望的，沮丧的_____________

15.感到惭愧的_____________16.不合法的______________

17.幸存_______________ 18.男性的__________________

19.女性的______________20.偏见，成见__________________

Phrases:

1）由于；归功于______________2）对……有瘾_______________________

3）对……做出决定_________________4）习惯于某事/做某事___________________

5）停止做某事________________ 6）为……感到惭愧/羞愧___________________

7) 尽管、不管、不顾_________________ 8）染上….习惯_________________

9）分享，共用__________________10）冒险___________________

11）处境危险；遭受危险_____________________

课堂导学

Step1：Can you tell what the word “it” refers to in each sentence?

1.It is a beautiful day here.

2. It is 20 kilometres from Grandad’s house to James’.

3. It seems amazing that at my age I am still fit enough to cycle 20 kilometers in an afternoon.

4. It’s my birthday in two week’s time.

5. You are finding it difficult to give up smoking.

6. I am sending you some advice I found on the Internet. It might help you to stop and strengthen your resolve.

Step2: Summarize the use of “it”.

一. 代词

（1）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)?

（2）代替指示代词this, that。

What’s this? (It’s) a computer．Whose pen is that? (It’s) mine．（3）也可以指动物或婴儿(未知性别的婴儿或孩子):

Is this your dog？No, it isn’t.

二、it作非人称代词

it有时并不指具体的东西，而泛指天气、时间、日期、

距离、价值、度量、温度、环境等，称为非人称的it：

1.指天气：

It is a lovely day, isn’t it? It is a bit windy.

2. 指时间: It was nearly midnight when she came back.

3. 指环境: It was very quiet in the café.

4. 指距离：It is half an hour’s walk to the city centre from my home.

5. 指日期：—What’s the date today? —It’s May 1, 2007.

6. 指季节It is summer now.

7. 指度量：It is about 5 kilograms.

8. 指价值：—What’s the price of the T-shirt? —It is 150 yuan.

【即学即练】1.

三、it用作形式主语

替代作主语的从句、动词不定式、动名词，而把真正作主语的从句、动词不定式、动名词置于句尾。

1. 替代作主语的动词不定式

（1）It be adj.（for sb.）to do sth.

此处adj. 通常为描述事件的形容词：easy，difficult，hard，necessary，unnecessary，possible，impossible，likely，unlikely，right，wrong，important，unimportant，legal，illegal，well-mannered，polite，impolite，clear，obvious，certain，suitable，proper，fit，useful，useless，dangerous…

例如：

1.__________________________________________ without a license.没有驾照开车对青少年来说是犯法的。

2.翻译：对他来说按时完成作业是不可能的。

_______________________________________________________________

（2）It be adj. of sb. to do sth.

此处adj.通常为描述人的形容词：kind，unkind，nice，rude，cruel，considerate，thoughtful，thoughtless，careful，careless，silly，foolish，stupid，clever，wise，crazy….

例如：It’s kind of you to help me with the problem.