如果我早知道交通状况,我就会早点出发了。

If I had known about the traffic, I would have left earlier.

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If I had known about the traffic, I would have left earlier.

if 是连词,表示"如果",用于引导条件状语从句。在这个虚拟语气句子中,if 引导了一个与过去事实相反的假设条件。

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