虚拟语气 表示与过去的事实相反的愿望用过去完成时么 为什么用了have been fixed而不是had been fixedthis ATM has been out of service for a few days .it should ( have been fixed )last week
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虚拟语气 表示与过去的事实相反的愿望用过去完成时么 为什么用了have been fixed而不是had been fixedthis ATM has been out of service for a few days .it should ( have been fixed )last week
虚拟语气 表示与过去的事实相反的愿望用过去完成时么 为什么用了have been fixed而不是had been fixed
this ATM has been out of service for a few days .it should ( have been fixed )last week
虚拟语气 表示与过去的事实相反的愿望用过去完成时么 为什么用了have been fixed而不是had been fixedthis ATM has been out of service for a few days .it should ( have been fixed )last week
should 是助动词,后面的动词当然要用原形
虚拟语气的形式是should(could) have done
因为前面已经有助动词should,后面就用原型。
前半句为客观事实,不是虚拟。后半句
should have done/ should have been done 表示【本应.....】实际没有。
should + do / be done -------- 是一般式形式 -------用于现在或者将来
should have (been) done-------是完成式形式 --------用于过去