1、否定转移句式.从句的否定转移到了主句中.2、enough的用法. 一、enough可以作名词、代词,意思是"足够;充分".作代词可以代替可数名词或不可数名词,在句中作主语或宾语.如：
1. Enough has been said on this subject. 关于这一问题说得已经足够多的了.
2. No, thanks. I've had enough. 不,谢谢.我已吃饱了.(enough=enough food)
【注意】当enough后的名词前有冠词、形容词性物主代词、指示代词或其本身就是代词时,要用介词of.如：
We've had enough of your coldness. 我们已经受够了你的冷漠.
二、enough作形容词,意思是"足够的;充分的",常与for或不定式连用,可以作定语或表语.作定语置于被修饰的名词前后均可,前置时强调enough,后置时强调被修饰词.如：
1. I hope there are enough glasses for each guest to have ______.
2. Five men will be quite enough. 五个人就足够了.
三、enough作副词的意思是 "十分地;充分地;足够地;充足地",置于被修饰的形容词或副词之后,常与不定式或介词for连用 ,在句子中作状语,表示程度.如：
1.-Mum, I think I'm ________ to get back to school.
-Not really, my dear. You'd better stay at home for another day or two. (Key：C)
A. so well
B. so good
C. well enough
D. good enough
2. If I had ________, I'd visit Europe stopping at all the small interesting places. (Key：A)
A. a long enough holiday
B. an enough long holiday
C. a holiday enough long
D. a long holiday enough
3. When they reached the burning building they found that their ladders were not long enough to reach the people who were trapped. 当他们靠近烈火熊熊的大楼时,他们发现梯子不够长,够不着那些被火围困的人.
4. -You were brave enough to raise objections at the meeting.
-Well, now I regret ________ that.
四、enough作感叹词时意思是"够了;停止;住手;不要再继续了",用以表达不耐烦或恼怒.如：
You've been practising the violin all afternoon. Enough! 你整个下午都在练小提琴.够了!
五、用在"主语+cannot...+enough"句型中该句型形式上是否定句型,实际上表达的是肯定意义,意思是"再……也不过分；越……越……".如：
I cannot thank you enough. 我对你感激不尽.(我怎么感谢你都不算过分.)
六、enough还可以用于以下的短语中
1. sure enough 果真；确实.如：
He said he would come, and sure enough he came. 他说要来,果然来了.
2. well enough 还不错； 还可以； 相当； 很； 极.如：
You know well enough. (口)你明明知道.(你心里明白.)
3. be good / kind enough to do sth. 劳驾； 务请做某事.如：
Be good / kind enough to reply early. 请早日赐复.三、whom的用法.关系代词who与whom 的用法区别 两者均只用于人,从理论上说,who 为主格,whom为宾格.如：Where’s the girl who sells the tickets? 卖票的女孩在哪里? The author whom you criticized in your view has written a letter in reply. 你在评论中批评的那个作者已写了一封回信.但实际上,除非在正式文体中,宾格关系代词 whom 往往省略不用,或用who或that代之.如：The man (that, who, whom) you met just now is called Jim. 你刚遇见的那个人叫吉姆. 不过,在以下几种情况值得注意.如：(1) 直接跟在介词后面作宾语时,只能用 whom,而且不能省略.如：She brought with her three friends, none of whom I had ever met before. 她带了brought with her three friends, none of whom I had ever met before. 3个朋友来,我以前都没见过.(2) 引导非限制性定语从句且作宾语时,who 和 whom均可用,但以用 whom 为佳,此时也不能省略.如：This is Jack, who [whom] you haven’t met before. 这是杰克,你以前没见过.