a personal pronoun的用法和样例：
- Remark: Cases refer to the function of a personal pronoun in a sentence.
- During the Chunqiu Zhanguo period,it was used as a preposition "Yu" and then became a personal pronoun and a conjunction.
- A DP Structure Headed by a Personal Pronoun
- A person is no happier because he rolls in wealth.
- We should not judge a person by his appearance.
- As Personal Pronoun or Demonstrative Pronoun.