虚拟条件句的宾语从句的时态问题

I would not have come here if I had known he would be here.

我知道这是虚拟语气，与过去事实相反，我的问题是能不能把 he would be here 改成 he was here, 这两个句子有什么区别？

he would be here不能改为 he was here。

我们将虚拟条件句改为陈述句表示的事实：

I came here because I didn't know he would be here.

didn't know是came动作发生时的过去状态。he在这里是came动作发生后到达这里的状态，对didn't know而言是过去将来的状态，因此要用过去将来时态。

改为虚拟条件句后，主句和从句的谓语都是与事实相反的表述，所以要用虚拟语气，但if从句的谓语却仍然是从过去看的过去将来的事实，因此要用陈述语气，即时态不变，仍用过去将来时would be here.

曹荣禄 -

擅长：动词用法,句法问题 | 采纳率 82% | 回答于 1秒前

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