1. I can talk about the things I can and cannot do according to the rules.
Can we ? No,
Can

1. Can we listen to music in class? No, we can't.
2. Can we run in the hallways? No, we can't.

根据七年级下册关于规则的话题，通常用"Can we + 动词原形?"提问，否定回答用"No, we can't."。后两空可延续规则相关提问，如"Can you run in the hallways?"及回答"No, I can't."。

2. I can describe rules in different places by using imperative sentences (祈使句) and modal verbs can/can't, have to, must and mustn't.
Imperatives sentences:

can/can't:

have to:

must:

mustn't:

Imperatives sentences: Keep quiet in the library. ； Don't run in the hallways.
can/can't: You can read books here. ； You can't talk loudly.
have to: You have to wear a uniform at school. ； She has to finish her homework on time.
must: You must follow the traffic rules. ； We must be on time for class.
mustn't: You mustn't smoke here. ； They mustn't fight with others.

根据七年级下册英语关于祈使句和情态动词can/can't、have to、must、mustn't的用法，结合不同场景的规则描述，写出符合要求的句子。

3. I can explain how rules can be helpful.

Rules can keep us safe. Rules can help us have a good order. Rules can make our study better.

根据七年级下册关于规则的相关内容，从规则对安全、秩序、学习等方面的帮助来阐述。

4. I can understand how different people think and feel about rules.

Rules are important for us. Some people think rules are too strict. Others understand why we need rules.

题目要求理解不同人对规则的看法和感受，结合七年级下册关于规则的单元内容，可从规则的重要性、不同人对规则的态度（如支持、反对、理解）等方面回答，答案需为简单句。

Why do we need rules?

Rules help keep us safe. Rules make our life in order.

Rules help keep us safe. Rules make our life in order.