定义 / 说明
时间和地点介词虽然短，却是高频错误点，因为英语里有大量固定搭配。学习者通常知道 in/on/at 的基本含义，但在常见短语中仍会出错。这是因为介词选择并不总能靠逻辑推断。B1 阶段建议聚焦高频块，如 at 9、on Monday、in the morning、on the bus、in a car。掌握这些块能显著提升准确性和流利度。
关键规则
- at 用于精确时间和点位：at 9, at the station。
- on 用于星期、日期和表面：on Monday, on the wall。
- in 用于较长时间段、区域、房间，以及 car 这类交通工具：in July, in the room, in a car。
- 通常说 on the bus/train/plane，但说 in a car/taxi。
- 把常见短语整体记忆：in the morning, at night, on time, in time。
例句
- We met at 9. - 我们 9 点见面。
- I usually work in the morning. - 我通常在上午工作。
- She left on Friday. - 她周五离开了。
- He was sitting on the bus. - 他当时坐在公交车上。
- They came in a taxi. - 他们坐出租车来的。
常见错误
- ❌ I will see you in Monday. -> ✅ I will see you on Monday.
- ❌ She arrived on 8 pm. -> ✅ She arrived at 8 pm.
- ❌ He was sitting in the bus. -> ✅ He was sitting on the bus.