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初中英语状语从句知识点:原因状语从句

2016-06-06 10:03:41  来源:网络整理


  初中英语状语从句知识点:原因状语从句


  初中的学习知识范围更广,课程的内容更加抽象,更加难以理解,尽快地掌握科学知识,迅速提高学习能力,由爱智康编辑老师为您提供的初中英语句式句型知识点,希望给您带来启发!


  原因状语从句


  连词有:because as since now that等


  (1) 区分because, as, since, for


  ① because表示人们不知道的直接的原因或理由,着重点在从句,其所引导的从句,为全句句意的中心所在。通常用于回答why引出的疑问句,语气较强,除特别强调外,该从句一般位于主句后面,不能与so连用但是可以与so进行同义句转换。


  I didn't go aboard with her because I couldn't afford it.


  我没有和她一起出国是因为费用太高。


  ② as引导的原因状语从句所传递的通常是已知信息,从句多位于主句之前,表示双方那个已知的理由,如:


  As I didn't know the way,I asked a policeman.


  我不认识路,因而问警察。


  ③ since引导的原因状语从句多表示大家众所周知的理由,如:


  Since traveling by air is much faster, they decided to take a plane.


  既然乘飞机旅行快得多,他们就决定坐飞机。


  ④ for表示的理由是附加的或推断的,并非此原因,通常与主句用逗号隔开,不位于句首,如:


  He must be not at home, for the telephone isn't answered.


  用because, as, since, for 填空:


  We'll have to go to bed early ___________ we'll start off early tomorrow.


  ___________ you know all about it, tell me please.


  ____________ all the seats were taken, I had to stand.


  He must be at work, __________ the light in his office is still on.


  Lily didn't go to school ___________ she was ill.


  =_________________________________________________________.


  (4) now that引导的原因状语从句


  Now that "因为;既然",通常可以和since换用。用来表示一种新的情况,再加以推论。如:


  Now(that) you have passed your test, you can drive on your own.


  你既已诊断合格,就可以独自开车了。


  这就是我们为大家准备初中英语句式句型知识点的内容,希望符合大家的实际需要。

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