定义 / 说明
Comma splice 指两个独立分句仅用逗号连接。在标准书面英语中通常算错误，因为逗号强度不足以连接两个完整句。修复方式取决于分句关系：可用句号、分号，或并列连词（and/but/so 等）。该点在论文、报告、正式邮件中尤其重要。B2 阶段不仅要能识别错误，还要会选最佳修复。
关键规则
- 不要只用一个逗号连接两个完整独立分句。
- 用句号可完全分开。
- 若关系紧密，可用分号。
- 也可用“逗号 + 并列连词”：, and / but / so / yet。
- 若两边都能独立成句，单逗号通常不够。
例句
- I was late, so I missed the bus. - 我迟到了，所以错过了公交。
- I was late; I missed the bus. - 我迟到了；我错过了公交。
- She was tired, so she went home early. - 她累了，所以早回家了。
- The task was difficult, but we finished it. - 任务很难，但我们完成了。
- Prices rose; however, demand stayed high. - 价格上涨；然而需求仍高。
常见错误
- ❌ We were tired, we went home. -> ✅ We were tired, so we went home.
- ❌ She called me, I did not answer. -> ✅ She called me, but I did not answer. / ✅ She called me. I did not answer.
- ❌ The task was difficult, however we finished it. -> ✅ The task was difficult; however, we finished it.