Contigency
a. 预防性
🗣️ 情景例句
Oh, sorry. There must be some mistake.
哦，抱歉，一定是弄错了。
No matter what the excuse, you must not be late.
不管有什么借口，你一定不要迟到。
He's over there. He's cleaning the car.
他在那边，在洗车。