Question

“because”同“since”的分别.................

Answer 1

As/ since 与because 同样系连接词
亦都解作「因为」
但分别在于它们的用法和含意。以下系参考一位文法书Practical English Usage 作者Michael Swan的解释。英文部份系原稿
中文解释系我附加上去。 1) as and since As and since are used when the reason is already known to the listener/ reader
or when it is not the most important part of the sentence. As- and since- clauses often e at the beginning of sentences. 当我地要提及的原因系大家已知
就会用as and since
或者当这个原因并非某句子的重点。因此
as and since的 clause 通常会被放在句子的开端。 As it’s raining again
we‘ll have to stay at home. Since he had not paid his bill
his electricity was cut off. As- and since-clauses are relatively formal: in an informal style
the same ideas are often expressed with so. 2) because Because puts more emphasis on the reason
and most often introduces new information which is not known to the listener/ reader. 如果改用Because时
一般系要去强调所提及之原因
或者此原因系对方未知的。 Because I was ill for six months
I lost my job. When the reason is the most important part of the sentence
the because-clause usually es at the end. It can also stand alone. Since and as cannot be used like this. 由于此原因系句子的重点
所以通常留在句子的末端。甚至可以用作的句子。 Why am I leaving? I‘m leaving because I‘m fed up! (NOT…I‘m leaving as/since I‘m fed up!) Why are you laughing? Because you look so funny.
参考: englishforum 及 oup (即Oxford University Press)
没有分别，但如果since后面是年份的话，就解自从的意思。
参考: 书本
since ad.(常用于现在完成式或过去完成式) 1.此后;从那时到现在 She left school three years ago and has worked as a nurse ever since. 她三年前毕业
从那时起便一直当护士。 2. 之前
以前 prep. 1. (常用于现在完成式或过去完成式)自...以来
从...至今 I haven't heard from him since last year. 我自去年以来未曾收到过他的信。 conj. 1. (常用于现在完成式或过去完成式)自...以来
从...至今 It's been ten years since they married. 他们结婚到现在已经十年了。 2. 既然;因为
由于 He must have taken the book since it isn't here. 他一定是把书拿走了
因为书已不在这里了。 conj. 1. 因为 He is absent because he is ill. 他因病缺席。
参考: yahoo