_______ your letter,I would have started ff two days ago.AIf I recevied B.Had I received

分类: 作业答案 • 2021-12-24 16:53:16

问题描述：

答

选B这是一个虚拟语句,与过去事实相反,若与过去事实相反,条件从句的谓语动词用过去完成时（had+过去分词）,主句谓语用should（would；could；might）+have+过去分词