定义 / 说明
附加疑问句是加在陈述句末尾的简短问题，用于确认信息、征求认同或推动互动。它在口语中非常常见，能让对话更自然。附加部分形式取决于主句的助动词，以及主句是肯定还是否定。一般规则是：肯定主句接否定附加，否定主句接肯定附加。要用对附加疑问，需要熟练掌握助动词、代词和句意。
关键规则
- 肯定主句通常接否定附加：It's late, isn't it?
- 否定主句通常接肯定附加：You don't know him, do you?
- 用匹配的助动词：is/isn't, do/don't, can/can't, has/hasn't 等。
- 若主句无助动词，附加疑问用 do/does/did。
- 附加中的主语用代词：isn't it?, do they?
例句
- It's late, isn't it? - 很晚了，不是吗？
- You don't know him, do you? - 你不认识他，对吧？
- She can drive, can't she? - 她会开车，是吧？
- We met before, didn't we? - 我们以前见过面，对吗？
- The food was good, wasn't it? - 食物很好吃，不是吗？
常见错误
- ❌ It's late, is it? -> ✅ It's late, isn't it?
- ❌ You don't like coffee, don't you? -> ✅ You don't like coffee, do you?
- ❌ She works here, isn't she? -> ✅ She works here, doesn't she?