一个人不想结婚的英文句子可以有多种表达方式，以下是一些常见的例子：

1. I don't want to get married.

2. I don't want to be married.

3. I do not want to get married.

4. I don't want to get married for a lifetime.

5. I don't want to get married because I don't want any commitments.

6. I value my independence and freedom, and I don't want to be tied down to someone else's expectations or schedule.

这些句子都可以传达出一个人不想结婚的意愿。选择哪一句取决于具体的语境和个人偏好。