Worksheet for learning prepositions of time with interactive exercises.

Problem Overview:

The task involves completing sentences using the prepositions at, in, on and writing dates using the format st, nd, rd, th. The worksheet provides a reference chart for when to use each preposition based on time expressions (e.g., specific times, days, months, years).

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Solution:

#### Part 1: Complete the Sentences
We need to choose the correct preposition (at, in, on) for each sentence based on the context of the time expression.

1. My parents will arrive ______ 7 o'clock.
- Time: 7 o'clock (specific time)
- Preposition: at
- Sentence: My parents will arrive at 7 o'clock.

2. I'm meeting my friend ______ Tuesdays.
- Time: Tuesdays (repeated day of the week)
- Preposition: on
- Sentence: I'm meeting my friend on Tuesdays.

3. She was born ______ 1985.
- Time: 1985 (year)
- Preposition: in
- Sentence: She was born in 1985.

4. I usually phone my friends ______ the weekend.
- Time: the weekend (general period)
- Preposition: on
- Sentence: I usually phone my friends on the weekend.

5. He usually brushes his teeth ______ the evening.
- Time: the evening (general period)
- Preposition: in
- Sentence: He usually brushes his teeth in the evening.

6. My birthday is ______ the 8th June.
- Time: the 8th June (specific date)
- Preposition: on
- Sentence: My birthday is on the 8th June.

7. I started doing my homework ______ eight o'clock.
- Time: eight o'clock (specific time)
- Preposition: at
- Sentence: I started doing my homework at eight o'clock.

8. It finished ______ midnight.
- Time: midnight (specific time)
- Preposition: at
- Sentence: It finished at midnight.

9. They arrived ______ 2005.
- Time: 2005 (year)
- Preposition: in
- Sentence: They arrived in 2005.

10. We got married ______ the age of 19.
- Time: the age of 19 (general period)
- Preposition: at
- Sentence: We got married at the age of 19.

11. Our holiday starts ______ Monday morning.
- Time: Monday morning (specific day and part of the day)
- Preposition: on
- Sentence: Our holiday starts on Monday morning.

12. Our parents will be back ______ an hour.
- Time: an hour (general period)
- Preposition: in
- Sentence: Our parents will be back in an hour.

13. I have lunch ______ noon.
- Time: noon (specific time)
- Preposition: at
- Sentence: I have lunch at noon.

14. My sister was born ______ May.
- Time: May (month)
- Preposition: in
- Sentence: My sister was born in May.

15. We have lunch ______ Saturdays.
- Time: Saturdays (repeated day of the week)
- Preposition: on
- Sentence: We have lunch on Saturdays.

16. My cousin is in London ______ December.
- Time: December (month)
- Preposition: in
- Sentence: My cousin is in London in December.

17. We sat and talked ______ lunchtime.
- Time: lunchtime (specific time)
- Preposition: at
- Sentence: We sat and talked at lunchtime.

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#### Part 2: Write st, nd, rd, th
We need to write the ordinal numbers for the given dates.

1. 1 March: 1st March
2. 2 March: 2nd March
3. 3 March: 3rd March
4. 4 March: 4th March
5. 5 March: 5th March
6. Christmas Day: 25th December
7. New Year's Eve: 31st December
8. Thursday: Not applicable (day of the week, not a date)
9. Discotheque: Not applicable (not a date)
10. The end of April: Not applicable (general period, not a specific date)
11. Monday evening: Not applicable (part of the day, not a specific date)
12. 17 October: 17th October
13. 18 October: 18th October
14. New Year's Day: 1st January
15. 10.15: Not applicable (time, not a date)
16. Bedtime: Not applicable (general time, not a date)
17. A few days: Not applicable (general period, not a specific date)

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Final Answers:

#### Part 1: Completed Sentences
1. My parents will arrive at 7 o'clock.
2. I'm meeting my friend on Tuesdays.
3. She was born in 1985.
4. I usually phone my friends on the weekend.
5. He usually brushes his teeth in the evening.
6. My birthday is on the 8th June.
7. I started doing my homework at eight o'clock.
8. It finished at midnight.
9. They arrived in 2005.
10. We got married at the age of 19.
11. Our holiday starts on Monday morning.
12. Our parents will be back in an hour.
13. I have lunch at noon.
14. My sister was born in May.
15. We have lunch on Saturdays.
16. My cousin is in London in December.
17. We sat and talked at lunchtime.

#### Part 2: Ordinal Numbers
1. 1st March
2. 2nd March
3. 3rd March
4. 4th March
5. 5th March
6. 25th December
7. 31st December
8. Not applicable
9. Not applicable
10. Not applicable
11. Not applicable
12. 17th October
13. 18th October
14. 1st January
15. Not applicable
16. Not applicable
17. Not applicable

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Final Boxed Answer:

\[
\boxed{
\text{See detailed solutions above.}
}
\]