1. behave badly: to be rude, unhelpful, or unpleasant and not do what you are told to do

例：

I knew I'd behaved very badly, and I was sorry. （我知道自己表现不好，让你失望了，很抱歉。）

The kids behaved so badly that I was embarrassed. （孩子们表现得太失礼了，为此我觉得很丢脸。）

2. badly behaved: someone who is badly behaved behaves badly - use this especially about children

例：

The hotel was full of badly behaved celebrities. （这家酒店住了很多名人，他们的行为举止都很讨人厌。）

3. misbehave: if children misbehave , they deliberately behave badly by being noisy, rude etc

例：

Kids often misbehave when they are bored or tired. （小孩无聊或很累的时候，就不老实了。）

We never dared to misbehave in Miss White's classes. （我们从来都不敢在怀特老师的课上捣乱。）

4. get into trouble: if someone gets into trouble, they do something that is illegal or against the rules, especially something not very serious, and get caught doing it

例：

Tony is always getting into trouble at school. （托尼在学校总惹祸。）

Don't copy my work or we'll both get into trouble. （别抄我的作业，抄的话我们俩都要倒霉。）

get into trouble with

He first got into trouble with the police at the age of 15. （他十五岁时第一次被警察抓。）

5. be up to no good: if someone is up to no good, they are secretly doing something that they should not do - use this especially when you think someone may be doing something bad, but you are not completely sure

例：

She knew that her brother was up to no good but she didn't tell anyone. （她知道她弟弟干了坏事，但是她没告诉别人。）

6. act up: to behave badly by being very active and noisy - use this especially about children

备注：''act up''是非正式的用法，英式英语中也常用''play up''。

例：

During his parents' divorce, Robert began acting up in class. （罗博打从父母离异起，就经常在班上捣乱。）

The kids have been playing up all afternoon. They're driving me mad. （孩子们整个下午一直吵吵闹闹乱哄哄的，我要疯了。）

7. mess around: to behave in a silly way when you should be working or paying attention

备注：''mess around''是非正式的用法，英式英语中也常用''muck about''。

例：

Stop messing around and pay attention! （别捣乱，注意听！）

Stop mucking about and listen! （别捣乱，注意听！）

8. try it on: to behave badly in order to find out how bad you can be before someone gets angry with you or punishes you

备注：''try it on''常用于英式英语中非正式的场合。

例：

For your first few days' teaching, the kids will probably try it on just to see how you react. （你刚开始做老师，学生肯定会尽量捣乱，以试探你的忍耐度。）

At home she's allowed to tell everyone what to do, but she wouldn't dare try it on at work. （在家她是老大，但是在公司她不敢乱来。）

9. step out of line: to behave badly by breaking rules or disobeying orders, especially in a situation where everyone is expected to be very obedient

例：

The prisoners were warned that if they stepped out of line they would be severely punished. （囚犯都被警告说如果行差踏错就会受严厉处罚。）

The boss is very tough on anyone who steps out of line. （老板对于不守规矩的人很凶。）