“It be 时间段 before...”请举例句和翻译

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“It be 时间段 before...”请举例句和翻译

before:used to say that something happens after a period of time:
It was several minutes before we realised what was happening.几分钟之后我们意识到发生了什么.

It is 1 hour before the meeting begins.
1个小时以后开会。

it was rainy beore he came back.
他回来之前下雨