22.1 句号
陈述句末尾用句号。
I like reading.22.2 问号
疑问句末尾用问号。
Do you like reading?22.3 感叹号
表达强烈情感时使用，但正式写作中不要滥用。
What a beautiful day!22.4 逗号
逗号常用于分隔状语、插入语、并列成分和非限制性从句。
After dinner, we went for a walk.
My brother, who lives in Beijing, is a doctor.
To be honest, I don't agree.常见错误是用逗号连接两个完整句子，称为 comma splice。
错误：
I was tired, I went to bed early.改法：
I was tired, so I went to bed early.
I was tired. I went to bed early.
Because I was tired, I went to bed early.22.5 分号
分号可连接两个关系密切的独立句。
I was tired; I went to bed early.也可用于复杂列表：
We visited Paris, France; Rome, Italy; and Madrid, Spain.22.6 冒号
冒号用于引出解释、列表或总结。
She has one goal: to become a doctor.22.7 大小写
以下情况首字母大写：
- 句首。
- 人名、地名、国家、语言。
- 星期、月份、节日。
- 标题中的主要词。
- 代词
I。
例句：
I study English on Monday.