七年级英语下人教版 Unit3there be 结构
1.There be 结构 
a.这是英语中常见的一种结构,表示“某地有某物”其含义为“存在有”。 
eg.There are twenty girls in our class.have也解释为“有”但是与there be有区别,它的含义是“所有,属有”,其主语为某人。eg.I have a nice watch.         
b.There be 结构中的be动词要和后面所跟名词保持一致。   
c.There is a river near our school.
否:There is not a river near our school.
问:Is there a river near our school.
回答:Yes, there is. No, there isnt.
划⑴How many rivers are there near our school?
Whats near our school?
d.there be 结构的一般将来时,同学们较难掌握,其正确形式为:there is going to be   
e.反意疑问句的构成:There is no water in the glass, is there?
There is going to _____ a football match this afternoon.
A.have  B.watch  C.be  D.play
They were sure that they were going to ____ a rest.
A.be  B.have  C.be on  D.on 
2.so,neither引导的倒装句,为了避免和前一句话的内容重复,英语中习惯用so,neither引导的倒装句。 
a.So+be(助动词,情态动词)+主语。表示某人也是如此。
eg.Mike has bought some foreign stamps. 
So has Bob.=Bob has bought some,too.
b.Neither+be(助动词,情态动词)+主语,表示某人也不。
eg.Mother has never been to Japan. 
Neither has Father.=Father has never been to Japan, either.     
c.So+主语+be(助动词,情态动词)。表示果真如此(赞同), 请同学们与a.区别。
eg.A:Mike is right in the classroom.
B:So he is.=He is really in the class room. 
3.Its+时间+since动词过去式。自从...起已有...时间了。
  Its two weeks since we met last.(自从我们上次见面已有两个星期了)
  How long is it since we left Beijing?(自从我们离开北京已有多久了 
4.祈使句+and (那么)...
eg.Go straight on and you’ll see a school. =If you go straight on, you’ll see a school. 
5.祈使句+or...否则...
eg.Work hard, or you will fall behind the other students. 
=If you don’t work hard, you’ll fall behind the other. 
6. The+比较级...the+比较级... ...... 
eg.The more, the better. 越多越好。
7.How do you like the film?  =What do you think of the film? (你认为这部电影怎样?)   
?怎样对付...?怎样处理...?
  虽然中文为怎样,我们绝不可照字面翻译为how.
eg.A:What have you done with the library book?
    B:I’ve just returned it to the library. 
9.I dont know what to do.我不知道该怎么办?
  I don’t know how to do. × 
be like?...是什么样的?
eg.Whats the weather like? 天气如何?
      Whats your school like? 你们学校是什么样的? 
for?为何目的?为什么?
eg.What do you want a science lab for?=Why do you want a science lab? 
12.one of +最高级+复数 ...之一
eg.Miss Zhao is one of the most popular teachers. 
13.find it +形容词+to do 
eg.I find it useful to learn English well. (我发觉学好英语是很有用的
    find +宾语 +名词    eg.I find him a good boy. (我发现他是个好男孩.)
    find +宾语 +形容词  eg.I find the door open/closed. (我发现门开/关着)
I find our bags filled with/full of presents. (我发现我们的包装满了礼物
14.I dont think+肯定句 我想...
eg.I dont think Ill take it. (我想我不买它了)
请注意:中文意思否定在从句中,但是英语的表达否定在主句中。 
  15.prefer A to B=like A better than B find的过去式更喜欢A不怎么喜欢B.
eg. I prefer fish to chicken.= I like fish better than chicken 
  16.had better do sth.最好干某事.
否定:had better not do sth.
特别注意:had better后面跟be动词词组,不可漏掉be.
eg.You’d better catch a train.
You’d better not talk in class.
You’d better not be late for the class. 
  17.It is good (nice)of+宾格+to do sth.
eg.It is very good of you to teach me English. (你教我英语真是太好了
18.It takes sb. some time to do sth.(干某事化费某人多少时间)
    =sb.spend some time on sth. (in) doing sth. 
eg.It took me half an hour to do the work.  =I spent half anhourin doing the work.    19.sb.pay for 某物化费了某人多少钱  =sb.spend on   = cost sb.
pay的过去式为paid 而不是payed.
eg.I paid thirty yuan for the coat. 
=I spent thirty yuan on the coat. 
=The coat cost me thirty yuan. 
20.have been to 某人曾去过某地,现在人不在那儿 
sb.have been in +地点 某人呆在某地(一段时间)
have gone to 某人已去某地,人不在这儿 
21. too…形容词(副词)+to"太…而不能" "太…以致于不"
eg.The basket is too heavy for me to carry. 这篮子太重我拿不动。
  This colour TV is too expensive for us to buy. 这台彩电对我们来说太贵了,买不起。
so...that 如此...以致于...
上面的结构的句子,可以换成so...that 引导的句子转换。
The basket is so heavy that I cant carry it.
This colour TV is so expensive that we cant afford it.   
不说How much ?形容人口数量的大用large
eg.The population of China is ten times as large as that of the USA 
23.Ive come to return your pan. (我跑来是还你锅的Why have you come? 而不用What 

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