文档介绍：for,because,as,sincefor,because,as,since第一部分第一部分because ,for ,as ,sincebecause ,for ,as ,since表示表示““因为因为””时的区别时的区别because, as, for, sincebecause, as, for, since这几个词都是表示这几个词都是表示““原因原因””的连词,语气由强至弱依次为:的连词,语气由强至弱依次为:becausebecause→→sincesince→→asas→→forfor;;其中其中because, because, since, assince, as均为从属连词,引导原因状语从均为从属连词,引导原因状语从句;而句;而for for 是并列连词,引导并列句。是并列连词,引导并列句。??1. because1. because表示直接原因,它所指的原因通常是听表示直接原因,它所指的原因通常是听话人所不知道的,其语气最强。常用来回答话人所不知道的,其语气最强。常用来回答whywhy的的提问,一般放于主句之后,也可以单独存在。提问,一般放于主句之后,也可以单独存在。??(1)I stayed at home because it rained. (1)I stayed at home because it rained. 因因为下雨我呆在家里。为下雨我呆在家里。??(2)Because (2)Because LinglingLingling was ill, she was ill, she didndidn””e to school. come to school. 玲玲因病,没有上学。玲玲因病,没有上学。??(3)Why is she absent? (3)Why is she absent? 她为什么缺席?她为什么缺席???Because she is sick. Because she is sick. 因为她病了。因为她病了。?? 此外,在强调句型中,只能用此外,在强调句型中,只能用becausebecause。例如:。例如:??(4)It was because I missed the early bus (4)It was because I missed the early bus that I was late for school. that I was late for school. 我上学迟到是因为我我上学迟到是因为我没有赶上早班汽车。没有赶上早班汽车。??sincesince侧重主句,从句表示显然的或已为人所知侧重主句,从句表示显然的或已为人所知的理由,常译为的理由,常译为““因为因为””、、““既然既然””,语气比,语气比becausebecause稍弱,通常置于句首,表示一种含有勉稍弱,通常置于句首,表示一种含有勉强语气的原因。例如:强语气的原因。例如:??(1)Since he asks you, (1)Since he asks you, youyou””llll tell him tell him why. why. 他既然问你,那就告诉他为什么吧。他既然问你,那就告诉他为什么吧。??(2)Since everyone is here, (2)Since everyone is here, letlet””ss start. start. 既然大家都到齐了,我们就出发吧!既然大家都到齐了,我们就出发吧!??(3)Since I understood very little (3)Since I understood very little Japanese, I Japanese, I couldncouldn””tt follow the follow the conversation. conversation. 我日语懂得不多,因而听不懂对我日语懂得不多,因而听不懂对话。话。??asas是常用词,它表示的是常用词,它表示的““原因原因””是双方已知的事实是双方已知的事实或显而易见的原因,或者理由不是很重要,含义或显而易见的原因,或者理由不是很重要,含义与与sincesince相同,但语气更弱,没有相同,但语气更弱,没有sincesince正式,常正式,常译为译为““由于,鉴于由于,鉴于””。从句说明原因,主句说明结。从句说明原因,主句说明结果,主从并重。果,主从并重。??(1)We all like her as she is kind. (1)We all like her as she is kind. 我们都我们都喜欢她,因为她善良。喜欢她,因为她善良。??(2)As I had a cold, I was absent from (2)As