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非限定定语从句中as与wich 的异同
  作者:天津宝坻一中 孟凡林   来源:英语教师网  发布时间:2012-04-06

在非限定定语从句中as which 都能做关系代词,指代主句所表示的整个情况或其中的某一部分,有时可以换用。如:

She is found of sports,as/which we are glad to hear.

She won the first place in the match,as/which was expected.

He failed in the history examination,as/which seemed natural.

as which 在用法上还有区别。如:

As we all know,the earth goes round the sun .(as 不等于which)

He has to work on Sundays,which he doesn't like.(as 不等于 which)

The building over there,which has a red star at it's top,is our new factory.

(as 不等于which)

as which的主要异同总结为以下几个方面:

1.位置的不同

   which 引导的非限定定语从句常放在主句之后;as 引导的 非限定定语从句常放在句首,句中,句末。如:

As is well-known,this kind of computer is out of date.(as 不等于which)

He was a foreigner,asI know  from his accent.(as 等于which)

2.可换用的情况

(1)关系代词在非限制性定语从句中做宾语。如:

     This elephant is like a snake,as/which anybody can see.

     He found the book,as/which was what we had wanted.

 (2)关系代词在非限制性定语从句中做主语,其谓语动词为be动词;不及物动词或及物动词的被动语态。如:

     She has been late again,as/which was expected.

     The team won the game ,as/which was what we had wanted.

3. 不可换用的情况

 (1)非限定性定语从句与主句语意一致,即非限制性定语 从句在意义上不与主句相抵触常对主句意义起一定的辅 助作用,用as;反之用which。如:

    She has married again,as we expected.

    The elephant is like a snake,which is not right.

  (2)在从句为主谓宾结构中,关系代词做主语时只用  which。如:

     He made rapid progress,which delighted his father. (主语)

   (3)在从句为主谓宾补结构中,关系代词做主语或宾语时,只用which.

    如:

        He started telling lies,which she felt strange. (宾语)

        His dog became ill and died,which made him very sad.(主语)

    (4)as常用的短语

       as often happens;as was pointed out;as was said earlier;as I  remebered;as we all know;as was known;the same as;such as....

      如:

         Tom has passed his examinations,as often happens.

          She has reads widely ,as appears from his articles.

      (5)as which填空

  1.She was married to that man,_____ was not expected.

  2.John got beaten in the game,____ had been expected.

  3._____ has been said above ,grammar is a set of rules.

  4.Cars,___ anyone can see ,run faster than tractors.

  5.We have to work in the evenings,____we don't like.

  6.He said that he had never seen me before ,___ was not true .

  7.There is great disorder,___ the newspaper will have told yes.

  8.I never saw such bad work ,____ Jack had done.

  9.This is the same story ___ my brother told me.

  10.My parents treat me as a child,___ I can't bear.

  11.Betty always tells lies,___ her parents find strange.

  12.He opposed the idea,___ could be expected.

  13.Mr Smith usually praises his student Rose in public,__ she  doesn't like at all.

  14.He saw the girl,____he hoped he would.

  15.Light travels in straight line,___ is a well known fact.

keys: 1.which   2.as   3.As    4.as    5.which    6.which   7.which/as    8.as    9.as     10.which    11.which   12.as    13.which        14.which/as     15.which/as

 

 
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