I have packed the camera.When_you_it?

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I have packed the camera.When_____you_____it?
A.have;packed B.do;pack C.already D.yet

When did you pack it?
没答案
这里when相当于一个过去时间状语,得和一般过去式连用
你的支持就是我的动力!
再问：抱歉，输入错误。应该是A.have;packed B.do;pack C.did;pack D.do;packed 但为什么不选A呢？问句明明是过去完成时啊？
再答： A 是现在完成时。尽管表示一个完成的动作，但毕竟属于现在时态的范畴，不可以和疑问词when（指过去未知时间），yesterday,last week..等连用。比如不可说： I have seen a film yesterday/last week.

I have packed the camera.When_____you_____it? I must have left the camera in the shop. 英语翻译i must have left the camera in a shop i packed a swimsuit ( ) i should have time to go to the beac have you packed the beach towels yet 翻译英语句型It the most feature packed versatile camera line produ have you packed your t yet?yes,i have packed it in my case单词英语翻译i am writing to complain about the camera.i have bought i can't afford the camera because i have just ——money.选littl May I have your camera.如何翻译 when did you buy the camera?I have had it for two days.A：hav I do not have enough money to a____ the digital camera