23.search
⑴作及物动词，后面直接跟宾语，如：房屋，人体，衣袋等。
  The police are searching the men.警察正在搜查众人（的身体）。
⑵ search for 是“搜索，找寻”后接具体的寻找对象。
    The police are searching for the man.警察正在搜索这个人（要找到他）。

29.cannot ...too...
  cannot 和 too,enough 等连用，表示“无论怎样也不为过”，“越……越……”。
    You cannot be too careful.你越仔细越好。
    We cannot praise him too much.我们无论怎样称赞他都不过分。
    I cannot thank

  语法精讲（介词）I

(六)表示“但是”的词汇
  1.but是并列连词,连接两个并列句,but前可用逗号。
She is rich but he is poor.她富有,但他贫穷。
He wanted to go， but she didn’t.他要去,但她不去。
2.although意为“尽管……(但是)……”,用于让步状语从句的句首。
Although I don’t want to （come）， I’ll com

下列句子中各有一处错误，找出并改正。
1．It took the firefighters two hoursto put out the big fire broken out lastnight．
2．I'll do all what I can to finish the work on time．
3．The Anti-Japanese War was lasted eight years before the Chinese won in the end．
4．This is a difficult question for usto rely．

从A、B、C、D中，选出可以填入空白处的最佳选项。
1．He came to my class every week，but his attitude ____ he was not really interested in the subject．
A．expressed B．described C．explained D．suggested
2．A verb must agree ____ its subject number and person．
A．in；with B．in；in C．with；with D．with；in

(5) ought to
① ought to表示“应该”,指道义上有责任或显示所采取的行动正确或明智,其否定式为ought not to, oughtn't to。如:She ought to look after her children better.她应该把自己的孩子照顾得好些。I wonder whether I ought not to speak to him about it.我不知道我该不该跟他谈一谈这件事。You ought to be more careful, you know.你该小心一点。Ought he not to see a doctor? 他不该去看看医生吗?

热点之一：含有否定意义的副词放在句首引起的部分倒装
此类副词有：not，never，seldom，hardly，rar

10. as (so) long as