stay up doing与stay up to do 什么区别?

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stay up doing与stay up to do 什么区别?
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stay up doing与stay up to do 什么区别?
stay up doing与stay up to do 什么区别?

stay up doing与stay up to do 什么区别?
1、stay up doing= stay up and do...(doing 状语,表伴随状况)
2、stay up to do = stay up in order to do...(to do 目的状语)

⑦leave off to do 离开某地去干什么(目的状语) doing停下某事 It

doing sth是正在
to do sth 就等于还准备或者策划中,或者还没开始做。