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Grammar Worksheet

Prepositions of Time: In, On, At

A1–A2 in, on, at with time expressions
Explanation

Use at with clock times and fixed points: at 8:00, at night, at the weekend.

Use on with days and dates: on Monday, on 12 June, on my birthday.

Use in with months, years, seasons, and parts of the day: in July, in 2026, in the morning.

Form
PrepositionUseExamples
attimes and fixed pointsat six, at night, at lunchtime
ondays and dateson Friday, on 5 May, on my birthday
inlonger periodsin winter, in 2026, in the evening

Say in the morning, in the afternoon, in the evening — but at night.

No preposition with today, tomorrow, yesterday, last, next, every, and this.

Examples
  1. The lesson starts at nine.
  2. We meet on Tuesdays.
  3. My birthday is in April.
  4. I usually study in the evening.
  5. She works at night.
  6. The exam is on 18 June.
  7. They moved here in 2021.
  8. I saw him last week.
Common Mistakes
Exercises
1 Choose in, on, or at

Write the correct preposition. Use X for no preposition.

_____ Monday  →  on Monday

  1. 7:30
  2. the morning
  3. Saturday night
  4. next week
  5. 2026
2 Correct the mistake

Each sentence has one mistake. Write the correct sentence.

  1. The film starts in eight o clock.
  2. My birthday is at July.
  3. We have English in Mondays.
  4. I visited them on last summer.
3 Complete the sentences

Write in, on, at, or no preposition.

  1. I usually go shopping the weekend.
  2. The meeting is 15 March.
  3. We travel a lot summer.
  4. She called me yesterday.
  5. I never study night.
4 Sort the expressions

Write each expression with the correct preposition.

  1. Monday
  2. five o clock
  3. the afternoon
  4. 2018
  5. my birthday
5 Your calendar

Write four true sentences about your week. Use time prepositions correctly.

  1. On Monday, I ...
  2. At ...
  3. In the ...
  4. Next week, I ...
Speaking Activity

Ask about schedules.

Listen for in, on, at, and no preposition.