答案解析

查看更多优质解析解答一举报1.

主句+before +主语+could “未来得及”如 He rushed out of the room before I could stop him.

2.

it was/wasn\'t +一段时间+before +从句 “过了.

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才/不到.

.

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就”如3.

it will /won\'t be+一段时间+before从

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