could have done到底是对过去的推测 还是 虚拟语气 能做到而没有做到?类似的还有 might must should need 这类的 全部都有对过去的推测 和 应该做么做到的意思吗?

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could never have done could not have done Could have done would have done should have done could have been done ,could have May not have done 是表示可能不还是不可能 那Could not have done呢 could never have done 造句 how could you have done should have done 与could have done 都是过去将来完成时吗有些题里会选这些,但有的是would have done 到底什么时候该用哪个呢 shouldn't have done couldn'd have done should have done could have done 他们的意思到底 实际有没有做就是比如说第一个的意思 到底实际上有没有做很纠结啊 would have done,might have done,could have done,should have done分别表示什么意思? should have done ,shouldn't have done.could have done,couldn't have done could have done和need have could have done和would have done的区别 should have done和could have done的区别? 高中英语中might have done 和could have done 英语：should have done与could have done区别? could have done 和 might have done 的区别 how could I have done为什么加have done为什么不说,how I could done ,还有这句话怎么翻译如果是正常语序,是不是I could have done