as,for ,because都表示因为时,用法怎么区分答:As he was not well,i decided to go without him. 由于他身体不太好,我决定不带他去. because ,since,for,as,with 都表示因为时有什么区别? because,一般放在主句后,常表示说华人认为这种原因或理由是听话人所不知道的。 eg;why were you absent? because i was not well because之前可以加 only, simply...