Word: 规矩 (guīju)

你坏了规矩。

Nǐ huàile guīju.

You broke the rule.

你最好规矩点儿。

Nǐ zuìhǎo guīju diǎnr.

You'd better behave yourself [a bit better].

你知道了不要质疑老师这个规矩。

Nǐ zhīdàole búyào zhìyí lǎoshī zhège guīju.

You are taught to never question your teachers.

你行为应该规矩些。

Nǐ xíngwéi yīnggāi guīju xiē.

You should try to behave better.

我遵守规矩。

Wǒ zūnshǒu guīju.

I follow the rules.