代 词1．指代时间、距离、自然现象等。It is half past two now.(指时间)现在是两点半。It is 6 miles to the nearest hospital.(指距离)离最近的医院是 6 英里。It is very cold in the room.(指温度)房间里很冷。A lovely day，isn’t it？(指天气)好天气，是吗？2．指代前面所提到过的事情、事物、群体、想法、性别不明或性别被认为不重要的人或动物、未指明但谈话双方都明白的事情或情况。—I’ve broken a plate.——我打碎了一个盘子。—It (＝Breaking the plate) doesn’t matter.(指前面所提到过的事情)——没关系。The Parkers bought a new house but it will need a lot of work before they can move in.(指双方都明白的事情)帕克一家买了一套新房子，但是在入住之前有大量的工作需要去做。3．it 作先行代词代替不定式、v.ing 形式、名词性从句，作形式主语或形式宾语。It felt funny watching myself on TV.(it 作形式主语，watching myself on TV 是真正的主语)在电视上观看自己非常滑稽可笑。He didn’t make it clear when and where the meeting would be held.他没有弄清楚何时何地举行会议。In my opinion，it’s no use arguing with him.依我看来，同他争论没用。4．表示“喜欢、恨”等心理方面的动词后面接 it，构成固定结构，这类动词有enjoy，prefer，love，like，hate，dislike，appreciate 等。I’d appreciate it if you would like to teach me how to use the computer.如果你教我如何使用电脑我感激不尽。I hate it when people talk with their mouths full.用心 爱心 专心1我讨厌人说话时满嘴食物。1.(2010·全国卷Ⅱ )The doctor thought________would be good for you to have a holiday.A．this B．thatC．one D．it解析： 句意为：医生认为度假对你有好处。本题考查代词 it 作形式主语。根据句意不定式短语 to have a holiday 在宾语从句中作真正的主语，只有 it 可作形式主语，故选 D 项。答案： D2．(2011·青岛市联合模拟)I would appreciate ________，to be frank，if goods could be delivered as soon as possible.A．you B．thisC．it D．myself解析： 考查代词。此处 it 作形式宾语，代替后面的“if goods could be delivered as...
