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我回来了英语(初中英语短语归纳解析(六))
主句,武器,从句我回来了英语(初中英语短语归纳解析(六))
发布时间:2016-12-08加入收藏来源:互联网点击:
9. as/ because/ for/ since
Ⅰ. 这三个词都可以用作连词,表“原因、理由” 但有区别:
Ⅱ. as “因为、既然”表示的原因或理由是明显的。语意不如because强。当理由是明显的,或者被认为是已知的时,则以用as 为好。如:
① As he was not well, I decided to go without him.
因为他身体不好,我决定独自去了。
② As it was getting very late, we soon turned back.
因为已很晚了, 我们很快就回来了。
③ As it is raining, you’d better take a taxi.
既然在下雨,你最好乘出租车。
Ⅲ. because “因为”表直接而明确的原因或理由。即必然的困果关系。在这几个词中,它的语意最强。回答以why 引导的特殊疑问句时,只能用because . 注意:because 不可以与so 连用。如:
① He had to stay at home yesterday because he was ill.
昨天他只得呆在家里,因为他病了。
② I did it because they asked me to do it.
我之所以做这件事,是因为他请我做的。
③ ---Why can’t you do it now? --- Because I’m too busy.
Ⅳ. since“既然”比as 较为正式,说明为人所知的原因。语气比because 稍弱。
① Since light travels faster than sound, we see lightening before we hear the thunder.
因为光比声音传播得快,所以我们先看到闪电,后听到雷声。
② Since he can’t answer the question, you’d better ask someone.
既然他回答不了这个问题,你最好问别人吧。
③ Since you are busy, I’ll do it for you.既然你忙,我替你做吧。
Ⅴ. for “因为”表原因或理由时,用以说明理由,只是解释性的。在这几个词中,它的语意最弱。它少用于口语中,也不用于句首。如:
① I asked her to stay to tea, for I had something to tell her.
我请她留下来喝茶,因为我有事要告诉她。
② We must get rid of carelessness, for it often leads to errors.
我们一定克服粗枝大叶的毛病,因为粗枝大叶常常差错。
③ It must have rained, for the road is wet.
一定下雨了,因为路是湿的。
④ I must go now, for my sister is waiting for me.
现在我得走了,我姐姐在等我呢。
[注]:这几个词按语意的强弱来排,其顺序为:
because—→since—→(as)—→for
10. as/ when/ while
这三个词都可以用作连词,表时间关系, 但有区别:
Ⅰ. as “当(在)……时候”往往可与when 或 while 通用,但它着重指主句和从句的动作或事情相并发生。如:
① I saw him as he was getting off the bus.
当下公共汽车的时候,我看见了他。
② As he walked on, he felt himself getting more and more tired.
他继续往前走的时候,感到越来越疲乏。
Ⅱ. when “当(在)……的时候”主句和从句的动作或事情可以同时发生,也可以先后发生。
① It was raining when we arrived.
当我们到达的时候,正下着雨。
② When we were at school, we went to the library every day.
我们在求学的时候,每天都到图书馆去。
Ⅲ. while “当(在)……的时候”表主句的动作或事情发生在从句中的动作或事情的进展过程之中。从句通常为进行时态。它有时可与when通用,但它只能指一段时间(a period of time),而不能指一点时间(a point of time)如上面的第一个例子。又如:
Please don’t talk so loud while others are working.
别人在工作的时候,请勿大声讲话。
While I am washing the floor, you can be cleaning the windows.
我洗地板时,你可以擦窗户。
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