worry,quite, as, shout,surpise,stay 的用法(明天考试了,拜托了...答:①下列情形时,只用as, 而不用when或while。 1)用于表示同一个人的两种动作交替进行,指一边---一边. 如: The girl sings as she goes to school. He looked behind occasionally as he went forward in the forest. 2)表示两个同步发生的动作或行?意思是随着---的发展.如: As time went on / by, sh...