at + 8 o’clock / 10:30 / midnight, etc. / night / the end of …
- I start work at 8 o’clock.
- The banks close at 5:00.
- I can’t sleep at night.
- I’m talking a trip at the end of October.
- at half past two: 2:30. 두시 반.
(on) + Sunday(s), Monday(s), etc. / April 25, June 6, etc. / Monday morning, Tuesday afternoon, Friday night, etc.
- Goodbye! See you on Friday. or See you Friday. (with or without on)
- Do you work on Sundays? or Do you work Sundays?
- The concert is on November 20th. or The concert is November 20th.
- I’m leaving on Friday night. or I’m leaving Friday night.
주말에 라고 말할 때 on the weekend / on weekends 라고 항상 on으로 말한다. We say on the weekend / on weekends (always with on).
- They like to go to restaurants on the weekend / on weekends.
in + April, June, etc / 2005, 1990, etc. / the spring/summer/fall/winter / the morning/afternoon/evening
- I’m talking a trip in October.
- Emma was born in 1984.
- The park is beautiful in the fall.
- Do you often go out in the evening?
next/last/this/every를 말할 때는 그 전에 at/on/in을 사용하지 않는다. We do not use at/on/in before next/last/this/every.
- I’m going to Chicago next Monday. (not on next Monday)
- We go on vacation every summer. Last summer we went to Europe.
- What are you doing this weekend?
in five minutes / in a few days / in six weeks / in two years, etc.
- Hurry! The train leaves in five minutes. (= It leaves five minutes from now)
- Goodbye! I’ll see you in a few days. (= a few days from now)