定义 / 说明
连接词用于连接观点，并表示原因、结果、转折或并列关系。标点帮助读者清楚识别这些关系，避免句子混乱。B1 阶段需掌握常见连接词如 because, so, but, however。重点不仅是选对连接词，还包括逗号、句号、分号等标点位置。它对避免 run-on sentence 和提升段落结构很关键。
关键规则
- 用 because 给原因：I stayed home because I was ill.
- 用 so 给结果：I was ill, so I stayed home.
- however 表示转折，常需更强标点支持。
- 当 so 连接两个完整分句时，通常在前面加逗号。
- 不要只用逗号生硬连接两个完整句子。
例句
- I was tired, so I went home. - 我累了，所以回家了。
- She stayed in because she was ill. - 她因为生病而待在家里。
- He tried hard; however, it was too late. - 他很努力；然而，还是太晚了。
- We left early because the traffic was bad. - 因为交通糟糕，我们早早离开了。
- I wanted to help, but I didn't have time. - 我想帮忙，但我没有时间。
常见错误
- ❌ I was tired, however I went home. -> ✅ I was tired. However, I went home.
- ❌ She stayed in, because she was ill. -> ✅ She stayed in because she was ill.
- ❌ He was late so the meeting started without him. -> ✅ He was late, so the meeting started without him.