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mky1991ll 发表于 2013-12-4 16:35 精彩~ 谢谢这位童鞋~
jzhuang08 发表于 2014-6-12 19:46 弱弱的问一下哦 文中既然说了,N sudden disappearance, 所以不应该理解为,N以前出现,但是现在消失了 ...
soulwangh 发表于 2013-12-4 10:47 From Ron: this isn't a present perfect construction, because it's actually an infinitive.
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