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should have done 和should be doing 有区别吗
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推荐答案 2011-08-01
should have done -----该做过的事情没有做
should be doing ------应该在做着某件事
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第1个回答 2011-08-01
should have done是虚拟语气,意味本该做什么,但是其实没有做。
should be doing就要结合句子,看具体怎么解释了
第2个回答 2011-08-01
should have done事情应该已经做了但实际上并没有做
should be doing事情应该正在被做
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