什么是原因状语从句?

其他答案(2)原因状语从句 要点: 由连词because, since, as引导, 也可由for, now that 等词引导 1.I didn’t go to school yesterday because I was ill. 我昨天没去上学，因为我生病了。 2. Since everybody is here, let’s begin our meeting. 既然大家都来了, 让我们开始开会吧. 3. As you are in poor health, you should not stay up late. 既然你身体不好, 你就不该熬夜. 4.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. .难点——because , since , as , for,辨析 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。