英文句子 I could not have done this without you为什么要+have?和I could not done this without you有什分别?

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英文句子 I could not have done this without you为什么要+have?和I could not done this without you有什分别?
英文句子 I could not have done this without you
为什么要+have?
和I could not done this without you有什分别?

英文句子 I could not have done this without you为什么要+have?和I could not done this without you有什分别?
have done 是完成时嘛··
而且情态动词后面要加动词原形嘛·
而句子想要表的的意思应该是没有你我是不能做成这个事的·既然是做成这事·当然应该用完成时
嗯·个人意见仅供参考

这个句子是现在完成时
现在完成时的构成是：主语+have/has+过去分词+其他
have在这里是助动词

I could not have done this without you
没有你我不会成功（已经完成了任务）
I could not done this without you
没有你我不能成功（侧重能力方面的）

could not have done 本不能做
固定用法
例如
should have done 本应该做，而没做
could have done 本可以做到，却没做
这种完成时有特殊意思

have done 表完成，句意为没有你，我不能完成这个。
不能是chould not done 应该为could not do without u 应该也可以。
但是意思为,没有你，我不能做某事,
强调的事态不一样。

have done 是表示已经完成的动作
I could not have done this without you意味着已经做了这件事。
I could not done this without you中done 应该为do。即：I could not do this without you表示还未做这件事

I could not have done this without you.我没有你不可能做完这个。could not have done 表示对过去所发生的事情的推测，could not done 只表示不能做某事。用于过去时。

差别不大。HAVE是强调这件事的后果存在

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