since,as,for,because引导的时间状语从句有什么不同

来源：学生作业帮助网编辑：六六作业网时间：2024/12/26 20:53:35

since,as,for,because引导的时间状语从句有什么不同since,as,for,because引导的时间状语从句有什么不同since,as,for,because引导的时间状语从句有什么

since,as,for,because引导的时间状语从句有什么不同
since,as,for,because引导的时间状语从句有什么不同

since,as,for,because引导的时间状语从句有什么不同
注意,since和as可以引导时间状语从句,for和because是不行的.
由since引导的时间状语从句.一般情况下,从句谓语动词用一般过去时,而主句的谓语动词用现在完成时.但在It is + 时间 + since从句的句型中,主句多用一般现在时（注意翻译）.例如：
I have been in Beijing since you left.自从你离开后,我一直在北京.
Where have you been since I last saw you?自上次我和你见面以后,你到哪里去了?
It is four years since my sister lived in Shanghai.我妹妹不在上海住有四年了.
as表示“一边……一边”,as引导的动作是延续性的,一般用于主句和从句动作同时发生；as也可以强调“一先一后”.例如：
We always sing as we walk.我们总是边走边唱.（as表示“一边……一边”）
As we was going out,it began to snow.当我们出门时,开始下雪了.（as强调句中两个动作紧接着先后发生,而不强调开始下雪的特定时间.）
这四个词都可以用来引导原因状语从句,差别如下
在语气上,because最重,表示的是直接原因,回答why时只能用它.其次是since,as,一般不表示原因,而是表明理由,进一步说明（译为：既然,由于）.For被认为是复合句的并列连词（常用于推断）,表示理由.如：
I didn’t go to school yesterday because I was ill.我昨天没去上学,因为我生病了.
Since everybody is here,let’s begin our meeting.既然大家都来了,让我们开始开会吧.
As you are in poor health,you should not stay up late.由于你身体不好,你就不该熬夜.
I asked her to stay to tea,for I had something to tell her.我请他留下来喝茶,因为我有事要告诉她.

as ,for,since,because的区别 since/as/because /for的区别 as ,since,because,for 的用法? because,for,since,as的区别 because,since,as,for 这几个词的用法区别 as,since ,for 和because表示原因时有什么区别? 英语中Because,for ,since ,as 有什么区别? because for as since表原因时强弱比较 Because , Since , . As , For 的意思和用法 since ,for ,as,because做因为是有什么区别 Because ,Since ,.As ,For 的意思和用法 for,because,since ,as的区别详解,多点例句 because,since,as,now that,for之间的区别表示原因的单词as for since because 的区别 because,since,as,now that,for之间的区别 because ,since,as ,for 引导原因从句时,差别在哪儿? because,since,as,for表示原因时有何区别? because ,since ,for ,because of,in that ,asbecause ,since ,for ,because of,in that ,as ,now that ,的区别,