①Who is it/that? ---It’s me.
②A bird landed on the tree. It’s singing.
③They got a baby and it was a ten-pounder
④It doesn’t matter. /It is a shame, isn’t it?
⑤They watched the train until it disappeared in the distance.
⑥I hate it when people talk with a full mouth．
2. 非人称代词：泛指天气、时间、环境
1.It is a lovely day, isn’t it?
2. It was nearly midnight when she came back.
3.It is April First today.
4. It is some 3000 kilometers from Beijing to Guangzhou.
5. It is three dollars.6.Today it is 30 degrees centigrade.
语法填空：每空仅填一词
____ was a sunny day.
Peter decided to go for a walk to the park, though _____ was two miles away.
___ was so comfortable to walk on the street.
如：
He made it easy to stduy English well. 我让学好英语这件事很轻松。
I think it best that you should stay here. 我认为你最好住这儿。
We think it no use complaining. 我们认为抱怨是没有用的。
Don′t you find it a waste of time watching television much?
将A句转换为B句
精讲点拨Sentence patterns
指it用来指代后面从句的情况
1. I can’t help ___ if she is always late.
2. I hate ___ when people talk with their mouth full.
3. I don’t like ___ when a Chinese host keeps serving me the food I don’t like.
4. I’d appreciate ___ if you can give me some useful information.
5 Please see to it that the door is locked.
6.You may depend on it that he will turn up in time.
补充：it 常用句型
1.it be done that ....（It is said/believed that .. It is recognized that.... It is suggested that....）
2.It is no good/use doing
3.It occurrd to me that.....
4.段时间句型 It has been/is +段时间 +since +主语+did It will be /will take +段时间 +before 主语+do （肯定/否定）
5.第几次做某事句型：(留位)
