专题一as的相关用法.doc

专题一：对as进行总结一、 倍数的表达方式。1) A是B的A+be+倍数+as+计量形容词+as+BA+be+倍数+the+计量名词+of+BThe+计量名词+of+A+be+倍数+that+of+Beg:His father is twice as old as he.This book is twice as expensive as that one.This room is twice the size of that one.This newly broadened square is four times the size of the previous one.The size of the newly broadened square is four times that of previous.2) A比BA+be+倍数+计量形容词比较级+than+Beg:This dictionary is twice more expensive than that one.注意：两倍twice和double三倍以上用 “基数+times”主语+谓语+as+adj或adv+again+asNine is as much as three.主语+谓语+倍数（百分比）This year well learn 20% more words from our texts than we did last year.二、 与as的相关短语。as busy as a bee 像蜜蜂一样忙碌as easy as ABC 像ABC一样容易as deep as a well 像井一样深as light as a feather 像羽毛一样轻as soft as butter 像黄油一样软as rich as a Jew 像犹太人一样富裕as is well discussed 正如已讨论过的as is often said 正如通常所说as is often the case 通常就是这样as has been pointed 正如指出那样as has been said before 如上所述as often happens 如同经常发生的那样as might be expected 正如所料as is well known to all众所周知as explained before 如前面所提到的as mentioned above 如前面所提到的as shown in the figure 如图所示as seen from the table 从表中可以看出as already discussed 正如已经讨论过的三、 与as相关的习惯用语。1. as soon as作“一就”解，引导时间状语从句。eg： As soon as I get to Beijing，Ill write to you我一到北京，就给你写信。2asso long as作“只要”解，eg：AsSo long as you study hard，youll make progress只要你努力，你就会取得进步。3as ifthough常用来引导方式状语从句，作“好像，仿佛”解。如果从句中讲的是非真实情况，则用虚拟语气。eg： She loves the child as ifthough he were her own她爱这个孩子如同爱自己的孩子。As ifthough也可用来引导表语从句，常用在“It appearslooksseems+as ifthough”句型结构中eg；It appears as ifthough it is going to clear up看起来天要晴了。It seems as ifthough he knew nothing about it.他好像对此事一无所知。4as to作“关于，至于”解。eg； There is no doubt as to his honesty他的诚实是无可置疑的。5as muchmany as作“多达”，“达到之多”解。eg：He can earn as much as 5000 dollars a month他每月能挣5000美元。6soas far as I know作“就我所知”解，在句中作插入语。eg：AsSo far as I know，he will come here next Monday据我所知，他将于下星期一到这里来。7as a result，as a result of表示“由于的结果”。eg：She died as a direct result of the accident她的死是那次事故的直接结果。8，as well为“也，还”之意。eg：Come early，and bring your brother as well早点来，把你的