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He was still smiling when the door opened and his wife came in.这句里的when the door opend是被动吗?为什么没有be动词?这个到底怎么理解?
人气:465 ℃ 时间:2019-08-19 19:29:47
解答
open在此是用主动的形式表示被动的意思
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