定语从句as的用法总结

时间:2021-08-31

  学生在学习过程中,常会遇到as作为关系代词出现,学生对as定语从句多有疑惑,如下是小编给大家整理的定语从句as的用法总结,希望对大家有所作用。

  (1) as引导的定语从句修饰表人或物的先行词,即先行词可以是人也可以是物;在定语从句中可以做主语、宾语或表语;常用于the sameas/suchas/as(so)as句型,as不论在定语从句中作何成分,均不能省略。

  ① 先行词为人such teachers, as作主语

  ②I’ll buy the same bike as I lost yesterday. 先行词为物the same bike,as作宾语 ,指同一类事物 ※此时注意和the same that 引导的定语从句的`区别

  It’ that引导定语从句,作宾语,指同一个事物

  ※ She wore the same dress that she wore at Mary's wedding. (the samethat特指同一个) 她穿着她在Mary婚礼上穿过的同一条裙子。 (the sameas 泛指同一类) 她穿着和她妹妹所穿的一样的裙子。 那块手表和我丢失的一模一样。(the sameas 泛指同一类) 那就是我丢失的那块手表。(the samethat特指同一个) ③The school is just the same one as it was 10 years ago.

  先行词为物the same one (school), as作表语

  It’ 先行词为物so heavy a box,as作宾语

  此时应注意as引导的定语从句和结果状语从句such / sothat的区分

  It’ 结果状语从句sothat如此以至于 ※He is such a good student as is liked by everyone.(定语从句,as在从句中作主语) (结果状语从句suchthat) that在从句中不充当任何成分,故不是定语从句,而是结果状语从句

  (2) as引导的非限制性定语从句可以修饰整个主句, 可以放在主句前,主句后或插入主句中间。此时as含有“正如” 之意。常用的as引导的非限制性定语从句固定表达有:

  as we all know / as everyone knows / as is known to all / as is well-known (众所周知)/ as I can remember(正如我所记得的) / as we expect / as was expected (正如预料的那样)/ as often happens / as we all can see / as can be seen / as has been said before (如前所述)…

  As everyone knows, Shakespeare is a famous writer.

  Shakespeare is a famous writer, as everyone knows.

  Shakespeare, as everyone knows , is a famous writer.

  (3)注意which引导的非限制性定语从句也可以修饰整个主句, 但不能放在主句前,常译为“这一点、这件事”。

  She is working hard, which everyone can see.which引导的非限制性定语从句不能放在主句前 She is working hard, as everyone can see.﹦As everyone can see, She is working hard.

  (4)注意当修饰整个主句时,as引导的非限制性定语从句含“正如”之意,因此在意义上不能和主句相抵触;which引导的非限制性定语从句则无此限制。如: 我们的球队输了比赛,这一点是未预料到的。此时不能用as。我们的球队赢了比赛,正如预料的那样。

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