一道专四语法题

__________，if I had arrived yesterday without letting you know beforehand?

A.Would you be surprised

B.Were you suprised

C.Had you been surprised

D.Would you have been surprised

答案是A。 但是为什么不选D呢？不是对过去的一种假设吗？求详解~

答：这题考错综时间虚拟条件句。

真实情况是：I arrived yesterday letting you know beforehand. 我是昨天到的，事先告诉过你的。现在我们见面了，你没有感到讶（You are not surprised)。假如我昨天到了而不给事先告诉你，当我们现在见面的时，你会不会很惊讶呢？主句（问题）问的是现在的情况：

If I had arrived yesterday without letting you know beforehand，woud you be surprised?

如果讲的是过去的情况，当时他并不惊讶，因为我事先告诉他了，则为：

If I had arrived yesterday without letting him know beforehand，he would have been surprised.

当面问的是现在的情况。如果前面有一句话：

You were not surprised when we met just now because I had told you about it before hand.

If I had arrived yesterday without letting him know beforehand，would you have been surprised ?

你刚才会惊讶吗？

所以，是去还是现在，还是为假设过去，主句是现在，还是要去理解体会句子的语境。