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（必修）英语1一年级《Theme C Learning to Know Helping others Unit 6 Helping People Grammar》优秀教案
It既是高中英语教学重难点,也是近几年高考的热点语法。
4教学过程4.1 第一学时4.1.1教学活动活动1【讲授】It的用法
一 作人称代词,可以用来代替人、物或事;亦作非人称代词,表示时间、天气、季节、距离等
1 ----Who is it?
-----It’s me, Mike.
2 Did you see my pen? I put it on the desk this morning.
3 That’s it.(就这么回事)
4 It’s fine today.
5 It’s only half an hour’s walk from my home to the school.
二 指无生命的东西,性别不详或性别无关紧要时,可用“It”来指动物,幼童等。
1 I threw the little dog to him and he caught it.
2 They got a baby and it was a ten-pounder.他们生了一个十磅重的婴孩。
三 作形式主语
英语中不定式、动名词、主语从句在作主语时,主语往往显得很长,使整个句子看上去有点头重脚轻,这时就需要借助“It”作形式上的主语,而把整个句子的主语移到句子后边去,使句子看上去平稳一些。
1 It is fun for him to study, but it is difficult to study and work at the same time.
2 It is very clear that the elephant’s leg is round and tall like a tree.
3 It will be no good learning without practice.
4 It is said that he put forward a new question at the meeting.
5 It is suggested that we (should) arrive there in 2 hours.
6 It’s a pity that our teacher can’t take part in our party.
7 It took thousands of people many years to build the Great Wall.
(注:句中划线部分为真正的主语)
四 作形式宾语
这种情况通常只用于能带以名词或形容词作宾语补足语的动词后面,这类动词可以是think/believe/feel/make/consider/find/---。而真正的宾语可以是动词不定式、动名词或从句。
1 In the 1870s, when Marx was already in his fifties, he found it important to study the situation in Russia, so he began to learn Russian.