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whould have done 和should have done 用于对于过去的推测的用法区别

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whould have done 和should have done 用于对于过去的推测的用法区别
如题:1——I can't find my purse anywhere.
-------You____have lost it while shopping.
Amay Bcan Cshould Dwould
2My MP4 player isn't in my bag .Where ___I have put it
Acan B must C should Dwould
(would have done 和should have done 都有对过去的推测的用法,这里应该用什么,它们有什么区别?)
whould have done 和should have done 用于对于过去的推测的用法区别
1——I can't find my purse anywhere.
-------You_A___have lost it while shopping.
Amay Bcan Cshould Dwould
2My MP4 player isn't in my bag .Where _d__I have put it
Acan B must C should Dwould
再问: whould have done 和should have done 用于对于过去的推测的用法区别是什么,第一题为什么不能选C和D
再答: C是本应该干什么,D推测过去的将来