but for应该加什么时态?
问题描述：
but for应该加什么时态?
But for my classmates' help,I ____ the work in time D
A） could not finish B） would not have finished
答
B.
But for = If not for = 如果不是因为
如果不是因为同学的帮助,我根本不可能完成了功课