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初中英语状语从句知识点:原因状语从句

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  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,语气最强,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 didnt go aboard with her because I couldnt 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 didnt 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 isnt answered.

  用because, as, since, for 填空:

  Well have to go to bed early ___________ well 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 didnt go to school ___________ she was ill.

  =_________________________________________________________.

  (2) 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.

  你既已考试合格,就可以独自开车了。

返回:初中英语知识点详解状语从句篇

  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,语气最强,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 didnt go aboard with her because I couldnt 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 didnt 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 isnt answered.

  用because, as, since, for 填空:

  Well have to go to bed early ___________ well 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 didnt go to school ___________ she was ill.

  =_________________________________________________________.

  (2) 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.

  你既已考试合格,就可以独自开车了。

返回:初中英语知识点详解状语从句篇

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