for、because、as、since用法辨析
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for、because、as、since用法辨析
1.It must have rained last night,___the ground is wet.
2.The day breaks,___the birds are singing.
1.It must have rained last night,___the ground is wet.
2.The day breaks,___the birds are singing.
都选for
原因状语从句
一 because,since,as和for引导的原因状语从句
1 because(因为):表示直接的原因或理由,着重点在从句,用于回答why,语气最强.
He didn't go to school because he was ill.
Why didn't he go to school?Because he was ill.
2 since(既然):一般表示对方已知的,无须加以说明的即成事实的理由,全句中心在主句,语气比
because弱.
Since you are ill,I'll go alone.
3 as(由于):表示十分明显的原因,一般说明因果关系,着重点在主句,语气较弱.
As it is snowing,we shall not go to the park.
4 for(因为,其理由是):是个并列连词,只能放在另一个并列句后面,表示推理或解释,或用作附加说明,表示新的情况,而不是指理由或原因,语气最弱,一般不放在句首.
The day breaks,for the birds are singing.
* for表示因果关系时,可以同because交替使用,但for前须用逗号,而because则不必.
You couldn't have seen him because he wasn't there.
= You couldn't have seen him,for he wasn't there.
*当原因是显而易见的或已为人们所知,就用as或since,且多放在句首.
Since/ As the weather is so bad,we have to delay our journey.
二 now (that) (既然,现已...所以,当...才);
Now (that) you've grown up,you should not behave like a child.
Now (that) I am older I see things differently.
Now (that) I have heard the music I understand why you like it.
这两个题我也不会,高考这种题考的不多吧,我们上高三的时候,很少考for的这种用法.如果不明白的话,就把它记住吧.
原因状语从句
一 because,since,as和for引导的原因状语从句
1 because(因为):表示直接的原因或理由,着重点在从句,用于回答why,语气最强.
He didn't go to school because he was ill.
Why didn't he go to school?Because he was ill.
2 since(既然):一般表示对方已知的,无须加以说明的即成事实的理由,全句中心在主句,语气比
because弱.
Since you are ill,I'll go alone.
3 as(由于):表示十分明显的原因,一般说明因果关系,着重点在主句,语气较弱.
As it is snowing,we shall not go to the park.
4 for(因为,其理由是):是个并列连词,只能放在另一个并列句后面,表示推理或解释,或用作附加说明,表示新的情况,而不是指理由或原因,语气最弱,一般不放在句首.
The day breaks,for the birds are singing.
* for表示因果关系时,可以同because交替使用,但for前须用逗号,而because则不必.
You couldn't have seen him because he wasn't there.
= You couldn't have seen him,for he wasn't there.
*当原因是显而易见的或已为人们所知,就用as或since,且多放在句首.
Since/ As the weather is so bad,we have to delay our journey.
二 now (that) (既然,现已...所以,当...才);
Now (that) you've grown up,you should not behave like a child.
Now (that) I am older I see things differently.
Now (that) I have heard the music I understand why you like it.
这两个题我也不会,高考这种题考的不多吧,我们上高三的时候,很少考for的这种用法.如果不明白的话,就把它记住吧.
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