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 So/as + 形容詞或副詞原級+ as的用法

1）在否定句或疑問句中可用so… as。 
　　He cannot run so/as fast as you. 
2）當(dāng)so/as… as 中間有名詞時(shí)采用以下格式。 
　　as +形容詞+ a +單數(shù)名詞 
　　即"so +adj. + a/an + n. (單數(shù)) + as "結(jié)構(gòu)中 
    I am not so strong a man as I was.我已經(jīng)沒有從前那么強(qiáng)壯了 
　　This is as good an example as the other is. 
    as + many/much +名詞 
　　I can carry as much paper as you can.. 

3）用表示倍數(shù)的詞或其他程度副詞做修飾語時(shí)，放在as的前面。
　　This room is twice as big as that one.
　　Your room is the same size as mine.　　
4) 倍數(shù)+ as + adj. + as　<=> 倍數(shù)+ then + of
　　This bridge is three times as long as that one.
　　This bridge is three times the length of that one.
　　Your room is twice as large as mine.
　　Your room is twice the size of mine.
5)幾個(gè)關(guān)于as...as的常見句型：

  (1)as...as possible 

  Please answer my question as soon as possible.請盡快回答我的問題。

  (2)as...as usual/before

  She looks as pretty as before.她看起來和以前一樣漂亮。

  (3)as long as... (引導(dǎo)條件狀語從句) 

  It took us as long as three years to carry out the plan.我們花了長達(dá)三年的時(shí)間才完成這項(xiàng)計(jì)劃。

  (4)as far as 

  He walked as far as the railway station yesterday evening.昨天傍晚，他一直散步到火車站。

  (5)as well as 

  She cooks as well as her mother does.她燒菜燒得跟她母親一樣好。

  一些帶有as...as結(jié)構(gòu)的常見短語歸納：

  as busy as a bee像蜜蜂一樣忙碌

  as easy as ABC像ABC一樣容易

  as deep as a well像井一樣深

  as light as a feather像羽毛一樣輕

  as soft as butter像黃油一樣軟

  as rich as a Jew像猶太人一樣富裕