would have had to do是什么用法

7 would have had to do是什么用法

第一句：there are still fewer than 20 Clovis sites where the remains of one or more mammoths have been recovered, a minuscule proportion of the millions that necessarily would have had to have been slaughtered within the overkill scenario.

第二句：You would have had to make a special trip into the cave to make the paintings, and a special trip to go see it.

请问老师，这里的两个would have had to do是什么用法？

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刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编 1秒前

擅长：语法理论,语言学,文化背景

1. have to do

2. have had to do

3. will have to do

4. would have to do

5. would have had to do

5 可以表示：

一、与过去情况不符的虚拟语气：

If the wound had been any deeper, you would have had to go to hospital.

如果伤口再深些，你就得上医院了。

二、对过去所发生情况的推测（肯定程度仅次于must have done）：

So she would have had to call him for something.

那她肯定会因什么事情打过电话给他的。

lfttmm2019 1秒前

would have done 此处为情态动词对过去的推测用法，would表“可能“

7 would have had to do是什么用法

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