新东方考研语法讲堂84

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5. 以上句型可以转换成以下形式：
    1）条件状语从句省略if：在书面语中，如果条件状语从句的谓语中有were, had 或should, 就可以省略if, 并将were, had 或should 放到句首，谓语主语之前，用 “Were/Had/Should + 主语”的形式。这种虚拟语气在意义上与带if 的条件状语从句相同。当然，如果从句没有were, had, 或should,就不能省略if.
    Now let’s look at some examples:
    If I were to do it, I’d do it some other way. →Were I to do it, I’d do it some other way.
    If you should fail, try again. →Should you fail, try again.
    If you had been here earlier, you would have seen him. →Had you been here earlier, you would have seen him.
    但是，If you came tomorrow, we would have the meeting.这句话if 就不能省略。
    而且，在虚拟条件状语从句中，省略了if的倒装形式的句首不能用动词的缩略形式。如我们可以说：
    Were it not for the expense, I would go to Italy.
    但不能说：Weren’t it for the expense, I would go to Italy.
    Please do not use “if”：
    如果我是你，我每天早上就早起床。
    Were I you, I would get up early every morning.
    假如你昨天早十分钟到达火车站，你就赶上火车了。
    Had you arrived at the station ten minutes earlier yesterday, you could have caught the train.
    要是明天有会议，我就会来。
    Should there be a meeting, I would come.
    2）用介词短语代替条件状语从句。（可以改为条件状语从句）。例如：
    Without air, there would be no living things.
    But for your help, I couldn’t have done it.
    Without electricity human life would be quite different today.
   
    Now let’s do some translation. 请用介词短语代替条件状语从句。
    要不是你的帮助，我就失败了。
    But for (except, without) your help, I would have failed.
    如果没有恰当的控制手段，核反应堆就会爆炸。
    Without proper means of control, a nuclear reactor would explode.
    3）用其他方式代替条件状语从句（可以改写为条件状语从句。）例如：
    It would produce bad results to do that. 用动词不定式 =If you did that/should do that, it would produce bad results.
    She would have come, but she wasn’t informed, nor invited. （用but.）=She would have come, if she had been informed or invited.
    A more responsible person would not have left the work half done. 一个更负责的人是不会把工作做到一半就不管的。(用比较级) ＝If you (he, she) were more responsible, you (he, she) would not have left the work half done.
   
    Now let’s do some translation:
     聪明一点的人是不会干出这等蠢事的。
     A wiser man would not have done such a foolish thing.
     我应该早点写完这封信，但我一直很忙。
     I should have written the letter earlier. But I have been very busy.
     要能登上珠穆朗玛峰，那经历该多棒！
    It would be a fantastic experience to climb up to Mount Everest.