英语作为文科科目当中的一个重要组成部分，需要记忆理解的东西比理科要多的多，所以复习的战线需要拉得更长，精品学习网为大家提供了2016中考英语难点详解，希望能够真正的帮助到大家。

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 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.

你既已考试合格，就可以独自开车了。

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