2 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？
最佳答案 2019-11-20 08:25
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。
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