24.not...until (连词)方才，才   
eg.He says that he won't be free until tomorrow.他说他需到明天方才有空。      肯定句＋until 到

eg.You'd better wait until tomorrow. (你最好等到明天)

23.I've come to return your pan. (我跑来是还你锅的)    →Why have you come? 而不用What

22.What's the population of ...? ...人口有多少？    不说How much population in...?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

21.⑴ too…形容词(副词)+to…"太…而不能" "太…以致于不"

eg.①The basket is too heavy for me to carry. 这篮子太重我拿不动。   ②This colour TV is too expensive for us to buy. 这台彩电对我们来说太贵了，买不起。

⑵so...that 如此...以致于...上面的too...to结构的句子，可以换成so...that 引导的句子转换。①The basket is so heavy that I can't carry it.      ②This colour TV is so expensive that we can't afford it.                      

  =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

19.sb.pay 钱 for 物 某物化费了某人多少钱=sb.spend 钱 on 物  =物 cost sb.钱 , 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.

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.

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)

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.

15.prefer A to B=like A better than B 更喜欢A不怎么喜欢B.

eg. I prefer fish to chicken.= I like fish better than chicken