couldn't have done?
couldn't have done究竟表示对过去的否定推测,还是表示本不能做到的事做到了?
人气:460 ℃ 时间:2019-09-09 11:42:17
解答
could (不能用 can) have done 表示“过去本能够做某事却未做.”注意:其否定形式 couldn't have done 没有虚拟语气的用法,couldn't have done 只能表推测,相当于 can't have done,意为:“过去不可能做了某事.”
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