报考2015年MPAcc考试的学子们已经进入了紧张的复习阶段，太奇教育特整理一系列英语备考复习资料，希望对备考MPAcc的学子们有所帮助。

　　一、虚拟式用于非真实条件句时的构成

　　例如：If I had time, I would go to the movies with you.

　　If we hadn’t made adequate preparations, the conference, wouldn’t have been so successful.

　　If it were to rain tomorrow, the game would be put off.

　　[提示]

　　1. 在非真实条件句中, 有时从句的动词所表示的动作和主句的动词所表示的动作并不同时发生,这样的条件句中使用的虚似式称为混合虚拟式。其构成视具体情况而定。

　　If I had taken my raincoat when I came out this morning, I would not be wet now.

　　If I were you, I wouldn’t have missed the film last night.

　　2. 引导非真实条件从句的连词if在正式文件中有时可以省去, were, had,

　　should等非行为动词这时应提到从句句首。

　　If I were you, I wouldn’t feel sorry.

　　→Were I you, I wouldn’t feel sorry.

　　3. 有些句子从表层结构上看无if引导的非真实条件句, 但从深层意思上看是存在的。这种情况下主句动词仍需用虚拟式。这类句子中常出现without(如果没有), but for(要不是),otherwise(否则), but that(若不, 后接一从句)等词或词组。

　　But for your help, they couldn’t have succeeded.

　　要不是你的帮助, 他们就不会取得成功。

　　She wasn’t felling well. Otherwise she wouldn’t have left the meeting so early.

　　她感不舒服。不然她不会那么早就离开会场的。

　　二、虚拟式也可用于其他情况

　　1. 在it’s necessary (important, natural, essential, proposed, required,suggested, impossible, strange) that…引导的真正的主语从句中动词应用虚拟式,表示必要、应该、建议、要求、惊讶、不相信等意。