Question

would you have called her up had it been possible ? yes,but？

Answer 1

1. C
由后句but...可知前句为对过去动作的虚拟，所以用would have done sth结构。
单句出现的虚拟语气，除了if only引导的句子之外，都是主句。
2. B
可以省略if的条件状语从句中，被提前的句首词只能是should/were/had，排除ACD.
此题为对将来动作的虚拟。
3．A
so that的虚拟语气，要求...,0,would you have called her up had it been possible ? yes,but i ? busy doing my hom
虚拟语气中半虚半不虚，的标志词是哪些？