这个句子中,为什么用would have taken ?In an hour, we can travel to the places which would have taken our ancestors days to reach.上面的句子中,which 引导的定语从句,为什么用would have taken ?

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这个句子中,为什么用would have taken ?In an hour, we can travel to the places which would have taken our ancestors days to reach.上面的句子中,which 引导的定语从句,为什么用would have taken ?
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这个句子中,为什么用would have taken ?In an hour, we can travel to the places which would have taken our ancestors days to reach.上面的句子中,which 引导的定语从句,为什么用would have taken ?
这个句子中,为什么用would have taken ?
In an hour, we can travel to the places which would have taken our ancestors days to reach.
上面的句子中,which 引导的定语从句,为什么用would have taken ?

这个句子中,为什么用would have taken ?In an hour, we can travel to the places which would have taken our ancestors days to reach.上面的句子中,which 引导的定语从句,为什么用would have taken ?
上句可转换为条件状语从句与过去相反的虚拟语气：If it had been in ancient times ,our ancesters would have taken days to reach the places which we can travel to in an hour.就好理解了.

would have taken 与过去事实相反的虚拟假设，意为：本来会花去（我们祖先好几天时间才能到达）

have done 表示过去完成时
首先，因为 ancestor祖先 是存在于过去的，那要“把祖先带到现代世界”，肯定是发生在“祖先那个年代”，也就是“过去”。因此先确定要用过去时
其次，“我们要去的那个把祖先带到现代的地方”，那么当“我们去了那个的地方时候”，“祖先”肯定已经“到了”。所以确定了要用过去完成时
最后，因为在客观现实中，“祖先”是不可能“被带到现代世界”的，...

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have done 表示过去完成时
首先，因为 ancestor祖先 是存在于过去的，那要“把祖先带到现代世界”，肯定是发生在“祖先那个年代”，也就是“过去”。因此先确定要用过去时
其次，“我们要去的那个把祖先带到现代的地方”，那么当“我们去了那个的地方时候”，“祖先”肯定已经“到了”。所以确定了要用过去完成时
最后，因为在客观现实中，“祖先”是不可能“被带到现代世界”的，所以用虚拟语气，所以是would
综上，也就构成了本句 would+过去完成时 的复杂结构
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二楼的 tlmm178 是错的

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在这里是虚拟语气，表假设，因为不是现实发生的事所以用would have taken

这个句子中,为什么用would have taken ?In an hour, we can travel to the places which would have taken our ancestors days to reach.上面的句子中,which 引导的定语从句,为什么用would have taken ? What have Kitty and Alice got?这个句子中 人名前面为什么用的是have? why the rhinoceros have become endangered?这个句子中为什么谓语动词用have,不用has? She must have gone out early,for she had not shown up at breakfast.这个句子为什么用“must have gone”,整个句子是虚拟语气吗?虚拟语气中不是用could(should would might)+have done的形式吗?在这里为什么用must,另外翻 He have breakfast这个句子中,用have还是has I was away that day.Otherwise I _____ to the meeting.a.would go b.had gone c.have gone d.would have gone这个句子确实要用虚拟语气,但是为什么不能选择B选项呢? Search as they would,they could find nobody.这个句子从句中的助动词为什么用would? 为什么这个英语句子看着这么别扭The easy way out would have been to feel sorry for myself and blame the world for my misfortune 这里为什么要用 have been`` 换成HAVE可以吗 这个英语句子为什么用过去将来时啊?When she studied in middle school,no fans could have imagined how well she would do in the world of entertainment.为什么要用would do his advice has made the design better than it would otherwise have been这个句型中为什么要用 otherwise ,otherwise 为什么要放在 would have been 中间, Should it rain,the crops would be saved.为什么用should coild would will为什么不行倒装我明白可是could would will 放在这个句子中，分别因什么愿意不正确呢 Without food, they would have nothing to eat and they would die 这个句子怎么翻译 I would love to (have gone) to the party last night but I had to work extra hours to finish a report.这个句子为什么要用have gone,难道不能用go吗? when television was first introduced,the extent----------it would affect society could not have been foreseen为什么要用to which ,不能用of which?这个句子结构怎么样的?能把它分成两个独立的句子吗? Jesues would have loved these shose为什么用would Would you mind sitting here.上面这个句子和Do you mind opening the door.这个句子为什么一个用would提问一个用do提问 If a friend said something bad about you ,what would you do?为什么这个句子中不用anything 而用something I will do anything that would harm my mind.这里为什么用“would”?这个句子是I will not do anything that would harm my mind.