UC知道the boy had run away__i could ask him some question
来源：百度知道 编辑：UC知道 时间：2024/07/07 00:54:15
答案选 before 为什么不是when
before 还没来得及。。。就。。。
男孩在我要问问题前逃跑
而我们不会说成男孩逃跑当我要问问题时
时态啊
前面用的是过去完成时，就是说明这个动作发生在过去之前
后面是过去时，那介词也就只能是before咯，才能表现出前面的动作发生在后面的动作之前啊
因为是过去完成时had run "他当时已经跑了"
如果人都不在了,你见他怎么问啊,呵呵...
你看一下时态啊，前面主句的时态是过去完成时，而后面从句只是一般过去时，所以前面时态先于后面动作的完成，所以用before
用逻辑思维来考虑,不要单从意思上想当然~你会发现before更确切!
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