It's hard for him/her to pay attention.他/她很难集中注意力。
Sometimes he/she lies.有时他/她说谎话。
Sometimes he/she says bad languages.有时他/她说脏话。
He/She never did that at home.他/她在家从来不这样。
I told him/her no yelling, no pushing.
He/She is easy to get grumpy.他/她很容易发脾气。
He/She likes to start a fight.他/她喜欢挑架。
Sorry. That's not what I expected. 对不起，这不是我期望的。
No scrawling over the wall.不要在墙上乱写乱画。
No writing on the desk.不要在桌子上写字。
It's not polite to snack in class.课堂上吃东西是不礼貌的。
If he/she can't obey the rules, I'm afraid he/she might be punished.
Standing in class, for example.比如说，罚站。
Hope you could understand.希望您能够理解。