字词模式
句模式
段模式
系统设置
更多按钮
网址切换
保存状态
用户反馈
页面收藏
-AA+
初一英语状语从句知识点:原因状语从句

原因状语从句

连词有: because as since now that

( 1)区分 because, as, since, for

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 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。

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 wayI asked a policeman.

我不认识路,因而问警察。

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。

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.

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.

你既已考试合格,就可以独自开车了。