It的用法讲解与练习题.docVIP

It的用法（专项总结） 一、人称代词1，it的最基本用法是作代词，主要指刚提到的事物，以避免重复: They watched the train until it disappeared in the distance.2.，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. They got a baby and it was a ten-pounder3.，也可指抽象事物或指抽象环境和情景: I hate it when people talk with a full mouth.．二、.非人称代词?1.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： ? .指天气：It is a lovely day, isn’t? it? ???.指时间: It was nearly midnight when she came back. .指日期:It is April First today.? .指距离:It is some 3000 kilometers from A to B. .指价值:It is three dollars.????? .指温度:Today it is 30 degrees centigrade. 三、其他用法1.在句子的主语不太明确时充当主语，表示谁在做某事： ?? Who is it there? Its I (me/you/he.....).???? ②I thought it was Mary, but it was not she.?? ③Her face?lighted when she saw who it was. 2.泛泛的指某件事： (有时泛指一般情况)?? It doesn’t matter. ??②It is a shame, isn’t? it?? ③How is it going?(情况怎样) It says in the newspaper that......3.it用在一些词组中，it 没有特别的意思?? The last trains gone. Come on, well foot it.(来，咱们步行吧。)四、作形式主语，替代主语从句，动词不定式，或动名词短语：　　　1.作形式主语替代主语从句??It is clear ( obvious， true， possible， certain....) that 从句 常译为＂清楚的（显然的，真的，可能的,肯定的．．．）＂　　??? It is very clear that he’s round and tall like a tree. ??= That? he’s round and tall like a tree is very clear. ? It is important ( necessary， right， strange， natural...) that 从句 ?常译为是重要的(必要的,对的,奇怪的,自然的).that 后的从句中要用虚拟语气（should + 动词原形），should 可以省去，建议记住该句型中的形容词。? ??It is important that we (should) learn English well.②It is necessary that he (should) remember these words. ?⑶It is said (reported/ learned/believed/thought/known/told/hoped.....) that 从句 常译为＂据说（据报道，据悉．．．）＂。 　　? ??It is said that he has come to Beijing. ②It is reported that another earth satellite has been put into orbit. ?⑷It is suggested ( advised/ ordered / demanded/ insisted/ commanded... ) that 从句.that　后的从句要用虚拟语气（should + 动词原形），should 可以省；常译为＂据建议；有命令．．．） 　?? It is suggested that the meeting ( should ) be put off. 　 ?? It was ordered that we ( should ) arrive there in two hours. ⑸It is time ( about time ，high t