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高中英语中as作连词的用法归纳

2010-12-31伍刚

新课程·上旬 2010年11期

  As在高中英语课本中出现的频率很高,主要是作介词和连词使用。因其作为连词的用法较多。常是困扰学生的难点之一。下面我们对这一用法进行分类归纳。
  
  一、as用于引导定语从句
  
  As引导的定语从句又可分为限制性定语从句和非限制性定语从句。
  (1)as引导的限制性定语从句通常构成“as…as…”,“such…as…”或者“the same…as…”等固定搭配,as在从句中用作主语、宾语、或表语。
  例如:
  ①Repeat this as of ten as is necessary.
  ②Such women as knew Tom thought hewas charming.
  ③You must show my wife the samerespect as you show me.
  (2)as可以作为关系代词引导非限制性定语从句。可以用来代替一个句子或单词,as引导的这类定语从句可以放在句首、句中或句中。
  例如:
  ①As was expected,he performed thetask with sucoess.
  ②Sophia was dishonest,as could bejudged from her eyes.
  ⑨My teacher,as might be expected,was present at the meeting.
  
  二、as用于引导时间、原因、方式或者让步状语从句
  
  (1)as引导时间状语从句时,表示主句的动作和从句的动作往往同时发生,具有延伸意义,一般同延续性动词连用,有时可以翻译为“一边……一边……”。
  A)某件事一发生,另一件事立即发生。
  ①As the sun lose.the fog disappeared.
  B)在某事发生过程中,另一件事发生。
  ②As I was coming here,I met your brother.
  c)两个动作同时发生。
  ③He smiled as passed.
  ④we get wlse as we get older.
  (2)as引导原因状语从句往往是十分明显的原因,听者或读者已经知道或者能够看出来,语气较弱,只能起附带说明的作用,比较口语化。
  例如:
  ①As allthe seats werefull,he stood up.
  ②It’s difficu It for us to know what to doas we are not his parents.
  (3)as引导比较状语从句,表示同级比较,意思是“像……一样”。
  例如:
  ①I cannot run as fast as he can.
  (4)as可用于引导方式状语从句,意思是:“如同……”,或者“按照……”。
  ①The students do everything as theteacher does.
  ②I’ve changed it as you suggest.
  (5)as用于引导让步状语从句,意思是“虽然”“尽管”,从句需要用倒装语序。
  ①child as he is.he knows a lot.
  ②Poor as he was,he was honest.
  ③Try as you will.you won"t manage it.
  ④Much as I admire him as a writer,Idon’t like him as a alan.
  
  作者单位:河南省沈丘县第一高级