I would have helped you with it, but I ___ so busy thenA.am B. was C. had been D. would be选什么?为什么啊?

问题描述:

I would have helped you with it, but I ___ so busy then
A.am B. was C. had been D. would be
选什么?为什么啊?

D. would be

C
本来我是能够帮助你的,可是那个时候我太忙了。(实际上是没能帮上忙)。
这里是虚拟语气,后面的句子要比前面的提前一个时态,所以选C

先was,因为后半名不是虚拟语系,在那时我确实很忙,过去时.

B
我愿意帮助你做这件事的,可是当时我太忙了。

B
不要被前面那句虚拟语气骗了,这是陈述客观事实,“我那时很忙”