must have done must have done 的用法详细说明. 可以归结为虚拟语气里面的么? must have been down 是must have down 的被动语态么
人气:269 ℃ 时间:2020-01-25 06:05:20
解答
Must have done 表对过去的推测. Must have been done 表对过去的被动推测. 例句,She must have loved deeply,so she was so hurt.她一定曾经爱的深,才会如此受伤. She must have been loved too,so she didn't have any regrets.她一定被爱过,所以她无憾.