新概念3 L17

It has been estimated that if the bridge were (这里为什么不是was?) packed with cars,it would still only be carrying a third of its total capacity.

if引导的是虚拟条件句，系动词要用were,请看后面的主句it would still...

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采纳率 4% | 回答于 2014-05-12 14:44

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黎反修 - 英语翻译（已退休） 2014-05-12 14:49

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if 引导的句子是虚拟条件句，所以用 were 不是was。