Had I known about this puter program, a huge amount of time and energy A.would have been savedB.had been savedC.will be savedD.was saved
网友回答
A解析试题分析：句意：如果我早知道了这个电脑程序，大量的时间和精力将会被节省。本题中为if 引导的虚拟语气对过去的情况进行假设，当从句谓语中有had,were,should，可以将if省略，将这三个词提前，构成省略和倒装的结构，对过去的情况进行假设，主句用would have done本题中为被动形式，故选A
考点：虚拟语气
点评：if的虚拟语气非常重要，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