Question

We were about to leave ___________ it began to rain 填什么啊 这个到底是延续不延续啊 不明白 为什么

Answer 1

We were about to leave when it began to rain.

Be about to表示将要正要……，

翻译为：当我们正要离开的时候天开始下雨了。

was / were about to + 动词原形。如：
　　
We were about to leave there when it began to rain heavily and suddenly.

就在我们要离开时，天突然下起了大雨。
　　
He was about to have lunch when the bell rang.

就在他要吃中饭的时候，门铃响起来了。