英语句式结构问题,If.at the time.the British had not feared invasion.it would have been completed.为什么用had
问题描述：
英语句式结构问题,If.at the time.the British had not feared invasion.it would have been completed.为什么用had
答
虚拟语气,过去与事实相反,本来应该用didn’t fear.虚拟之后时态提前,用Had