becuase for as since区别

becuase
因为的意思。。后面接从句,because that .....
或者用because of sth...后面接名词短语.
但是because的因果关系太强烈。。建议作文中尽量少用。

for
for可以表示原因,可以接从句也可以接名词短语.
比because 好一点..文章中用得比较多/

as
也可以表示"因为",后面接从句，，但是比较口语化.
而且as的含义太多。难免不发生歧义.

since
这个比较常见一点..也是接从句。。
表示的因果关系比较弱一点。。

比较：because, since, as和for

1） because语势最强，用来说明人所不知的原因，回答why提出的问题。当原因是显而易见的或已为人们所知，就用as或 since。
I didn't go, because I was afraid.
Since /As the weather is so bad, we have to delay our journey.

2） 由because引导的从句如果放在句末，且前面有逗 号，则可以用for来代替。但如果不是说明直接原因，而是多种情况加以推断，就只能用for。
He is absent today, because / for he is ill.
He must be ill, for he is absent today.

since,表示明显的原因，可以解释为既然
You'd better go to see the doctor since you look pale.

because，是最general的

as 和since相似，作因为讲用的不多

for表示非直接的原因，推测得来的原因,不用在开头
The day broke, for the birds were singing.

当