这是不定式作结果状语,表示以便于,意思相当于so that+从句,区别是so as to+动词短语,so that+从句.
如他们每天早起以便保持身体健康：He gets up early every day to keep healthy.或He gets up early every day so that he can keep healthy.
不定式特殊句型so as to ,这是什么句子怎么用啊?
这是不定式作结果状语,表示以便于,意思相当于so that+从句,区别是so as to+动词短语,so that+从句.
如他们每天早起以便保持身体健康：He gets up early every day to keep healthy.或He gets up early every day so that he can keep healthy.