- 早上该说 in the morning 还是 on the morning？星期几用 on，年份却用 in——时间介词看似简单，细节很容易搞混。
- at 用于精确的时间点（几点几分）、用餐时段和几个固定短语（at night、at Christmas、at weekends）。
- in 用于较长的时间段——一天中的时段、月份、季节、年份、年代、世纪；on 用于星期几和具体日期。
- at night 和 in the night 意思不同：前者指整晚的性质（比如上夜班），后者指深夜某个时间点（比如婴儿夜里醒来）。
重点内容
at — 精确时间点
用于时刻、用餐时间，以及几个固定短语。
| 用于 | 例子 |
|---|---|
| 时钟时间 | at 6 o'clock / at 9.30 / at 13.00 |
| 用餐时间 | at breakfast time / at lunchtime / at dinner time |
| 固定短语 | at night / at weekends / at Christmas / at Easter |
- I get up at 6.30 a.m. 我早上 6:30 起床。
- She works at night. 她晚上上班。
- At Christmas, we visit our relatives. 圣诞节我们去探亲。
at night vs in the night：
- at night = 整个晚上（She works at night. 她上夜班。）
- in the night = 深夜的某个时间段（The baby woke up in the night. 婴儿在深夜醒了。）
in — 较长的时间段
用于一天的时段、月份、季节、年份、年代、世纪。
| 用于 | 例子 |
|---|---|
| 一天的时段 | in the morning / in the afternoon / in the evening |
| 月份 | in January / in December |
| 季节 | in (the) spring / summer / autumn / winter |
| 年份、年代、世纪 | in 2025 / in the 80s / in the 21st century |
| 其他 | in the past / in the future / in the last few weeks |
- I usually relax in the evening. 我通常在傍晚放松。
- In summer, it's too hot here. 夏天这里太热了。
- She was born in 1998. 她 1998 年出生。
on — 特定的某天、某日期
用于星期几、特定日期、节日（单日）。
| 用于 | 例子 |
|---|---|
| 星期 | on Monday / on Friday |
| 日期 | on 30 July / on the second of August |
| 特定的日子 | on my birthday / on New Year's Day |
- On Fridays, I have a long lunch. 每个星期五我会吃顿长午餐。
- His birthday is on 19 October. 他的生日是 10 月 19 日。
快速对比
| 介词 | 用于 | 例子 |
|---|---|---|
| at | 时刻、用餐时间、固定短语 | at 5pm, at lunchtime, at night |
| in | 时段、月份、季节、年份 | in the morning, in March, in 2020 |
| on | 星期、日期 | on Tuesday, on 1 January |
例句练习
- The meeting is at 3 o'clock on Tuesday.
会议在星期二下午三点。
- I was born in September, in 1995.
我生于 1995 年 9 月。
- In the evening, I usually watch TV or read.
傍晚我通常看电视或阅读。
- The shop is closed at Christmas.
圣诞节期间这家店关门。
- We have a holiday on New Year's Day.
新年那天我们放假。
常见错误
❌ I'll see you in Monday.
✅ I'll see you on Monday.
❌ She wakes up on 7 o'clock.
✅ She wakes up at 7 o'clock.
❌ He was born on 1990.
✅ He was born in 1990. （年份用 in）
❌ We went in Christmas.
✅ We went at Christmas. （节日假期用 at）
Sources
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