Thank you for all your hard work last week.I don't think we ___ it without you.

问题描述:

Thank you for all your hard work last week.I don't think we ___ it without you.
A can manage
B could have managed
C could manage
D can have managed
这题为什么选B,为什么用虚拟语气现在完成时态啊?

说明一下,B是过去完成时.这句话的翻译是 谢谢你上周的努力工作,我认为(如果)没有你我们不能完成.last week 说明了是过去式without 虚拟语气与过去相反的虚拟,固定用法 后半句是虚拟语气,是对过去的虚拟,所以应该用...