Question

_________the thunderstorm ,they_________ the injured man in time. They felt sorry for that.

A．Had it not been for ; could reach

B．If there was not; might have reached

C．But for; might reach

D．If there hadn’t been ; could have reached

Answer 1

D

试题分析：句意：要是没有雷雨的话，他们本能够及时到达来帮助那个受伤的人的。他们对此表示很抱歉。if引导的从句是对过去发生的事情的假设，句子要用虚拟语气。if从句用had done,主句用would/should/could/might +have done的形式。故选D.
点评：if的虚拟语气非常重要， if的虚拟语气基本用法简要概括如下：1、表示与现 在事实相反的情况，从句：If主语+过去时(Be动词用were)；主句：主语+should/would/could/might+do：　2、表示与过去事实相反的情况，从句：If主语+had+done；主句：主语+should/would/could/might+have done　3、表示对将来情况的主观推测，从句：①if+主语+were to do②if+主语+should+do ③if+主语+did（动词过去式）/were ；主句：主语+should/would/could/might+do。