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涉及虛擬倒裝的考題

_________ he followed my advice, he would have succeeded.

A. When                  B. If                         C. Had                     D. Has

答案應(yīng)選C，但容易誤選B。不能選B，主要是因為時態(tài)前后有矛盾。由于主句謂語是would have succeeded，這表明是對過去事實作出的假設(shè)，所以從句謂語應(yīng)該是 had followed，所以，如果選B，句子應(yīng)該是 if he had followed my advice。但按英語語法，在此類表示虛擬條件的從句中，若有 had, should, were 等詞，便可省略 if，而將 had, should, were 提前置于句首。又如：

If he were my friend, I would ask him to lend me some money.= Were he my friend, I would ask him to lend me some money. 假若他是我的朋友，我就會向他借些錢。

If it should rain tomorrow, I should stay indoors.= Should it rain tomorrow, I should stay indoors. 如果明天下雨，我就呆在室內(nèi)。

If he had asked me, I would have told him. = Had he asked me, I would have told him. 要是他問過我，我就會告訴他了。