Ok, let's say that you have a really good relationship with your mom and you rarely ever fight.

我们假设你跟你母亲关系特别好，很少有口角。

I get so upset 课堂 - SpeakingMax英语口语达人

Let's say, you open a door to a restaurant and there's a huge fight going on.

假设你走进一家餐厅，里面有人在激烈地争吵。

I'd better 课堂 - SpeakingMax英语口语达人

Let's say, your one friend is in a fight with your other friend.

假设你的两个朋友在吵架。

It depends on 课堂 - SpeakingMax英语口语达人