单选：Bob would have helped us yesterday,but he _____.
A.was busy
B.had been busy
---------------------
key:A
难道不该是B吗?
人气：344 ℃ 时间：2019-08-20 17:44:22
解答
这个是对过去事实的陈述
翻译 鲍勃昨天本应该来帮助的,但是他很忙
他很忙是昨天的事实 不需要用虚拟语气的
您的支持就是我继续前行及帮助别人的动力 愿您与我一起传播『 爱心 』之种
望采纳↖(^ω^)↗
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