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a flight attendant told us to keep calm and to get off the plane quietly as soon as it had touched down.这里as soon as 后面为什么要用过去完成时？
网校学员大饼e**在学习英语零基础直达大学六级【老用户专享3年畅学 现金奖励班】时提出了此问题，已有1人帮助了TA。
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清醒季smile
同学你好，该知识点来自沪江网校《英语零基础直达大学六级【老用户专享3年畅学 现金奖励班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。
同学你好~完成时也可以在until, as soon as等引导的时间状语从句中表示将来。
I’ll wait until he has written his letter. 我愿等到他把信写完。
这里就是在过去时间框架下，用过去完成时，表示降落之后，才下飞机
祝同学学习进步~
版权申明：知识和讨论来自课程：《英语零基础直达大学六级【老用户专享3年畅学 现金奖励班】》的学员和老师，如果想了解更多，可以报名参加课程学习。所有知识讨论内容，版权归作者及沪江网校所有。
英语零基础直达大学六级【老用户专享3年畅学 现金奖励班】
已有1人在本课程中发现了11个知识
已有10个知识得到了老师的回复
本课程热门知识点
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- a style peculiar to Dickens，为什么不是a peculiar style to Dickens?
- a flight attendant told us to keep calm and to get off the plane quietly as soon as it had touched down.这里as soon as 后面为什么要用过去完成时？
- lack和lack of的区别？
- persist in和insist on的区别？