高中英语牛津上海版高中二年级第二学期It的用法精讲及提升练习（有答案）

It的用法精讲及提升练习 1、  it可指天气、温度、时间、距离等 e.g. —It is cold today, isn’t it?   2、  用作人称代词，代替前文提到过的事物 e.g. The dog is not a cold-blooded animals. It doesn’t need to hibernate.   3、  为避免重复，it可用来代替前面说过的短语或句子 e.g. I tried to persuade my father to give up smoking, but found it impossible. (it=to persuade my father to give up smoking)   4、  代替指示代词this，that e.g. —What’s this?  —It’s an album.   —Whose new bike is that? —It’s Mary’s. 【注】it与one，that的区别      it=the(this, that)+名词，特指并且代替前面所提到的某特定事物。    e.g. He’s bought a new car, so he drives it everywhere to show it off.      one=a+名词，one指前面提到的同类事物中的不同的另一个。    e.g. He needs a computer, but he can’t afford one.      that=the+名词，that指代的名词与前面的名词属于同一类，但不属同一个。    e.g. The population of China is larger than that of Japan.(注意：that指代population，但其后有一个of短语作定语，以区别于the population of China) 【注】it与that的异同       it指同一事物，that指同类但并不是同一事物    e.g. I like the climate of Kunming more than that of Beijing. The climate of Kunming is mild, and I like it.   5、  it作形式主语  it在句中可作