题目内容：

so,therefore,as a result,as的区别及用法.

优质解答

so是连词,引导一个句子,意为所以……,例It's raining heavily so I have to stay at home= I have to stay at home because It's raining heavily.因为……所以……,但是英语里只能出现because或so之一,不能同时出现...