这道四级题目为什么选这个?_____today,he could get there by Sunday.A Would he leave B Was he leaving C Were he to leave D If he leaves 正确答案是C ,但是为什么用were,不是was 不是单数吗

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这道四级题目为什么选这个?
_____today,he could get there by Sunday.
A Would he leave B Was he leaving C Were he to leave D If he leaves
正确答案是C ,但是为什么用were,不是was 不是单数吗

这是一个虚拟语气,所以用were

可能答案错了吧。

虚拟语气。没有理由,就这么用。

答案不可能错,虚拟语气的另一种形态,将were提前,相当于if。。。were。。