句子:And sometimes a tiny staggerer came suddenly rocking into the open from under the trees, stopped, stared, as suddenly sat down.
在这里as引导的是什么从句,什么结构?
个人理解:as引导时间状语,和前面的sometimes呼应,这个小孩有时候一跑出去,就会发生摔倒;爬起来摔倒,跑起来摔倒。