Prepositions of Time worksheet with examples and practice sentences.

Explanation:
We need to choose the correct preposition of time — in, at, or on — for each sentence, based on the rules given:

- In → used for months, years, seasons, and historical periods (e.g., *in December*, *in 2016*, *in winter*, *in the 17th century*).
- At → used for specific times (e.g., *at 12:00*, *at 8 o’clock*), meals (*at breakfast*), and places (but here we’re only dealing with time).
- On → used for days of the week (*on Saturday*, *on Wednesdays*) and specific dates (*on the 2nd of June*, *on January 3, 2018*).

Now go through each sentence one by one:

1) *The boys start eating their lunch ___ 12:00.*
→ Specific time → at

2) *It snows all the time ___ December.*
→ Month → in

3) *They practice soccer ___ Saturday.*
→ Day of the week → on

4) *Sir Isaac Newton was born ___ the 17th century.*
→ Historical period → in

5) *___ breakfast, she drinks coffee with only sugar.*
→ Mealtime → at

6) *___ the middle ages, armies used swords.*
→ Historical period → in

7) *She had the job interview ___ the 2nd of June.*
→ Specific date (day + month) → on

8) *The boys always have fun ___ festivals.*
→ General time period (festivals = recurring events, like seasons/holidays; think of “festivals” as similar to “summer” or “Christmas”) → at is common for festivals (e.g., *at Christmas*, *at Halloween*). But note: some may say *in festivals*, but standard usage is at for named festivals or general festive times. However, in this context, since it's plural and general (“festivals”), and not a specific date, the best fit is at (like *at parties*, *at weddings*). Let’s confirm: “have fun at festivals” is correct.

9) *She goes to dance class ___ Wednesdays.*
→ Repeated day of week → on

10) *They got married ___ August.*
→ Month → in

11) *They had a baby ___ 2016.*
→ Year → in

12) *The surgery occurred ___ January 3, 2018.*
→ Specific date → on

13) *___ Saturday, we usually go to the park.*
→ Day of the week → On (capitalized because it starts the sentence)

14) *The children start school ___ 8 o’clock.*
→ Specific time → at

15) *The birds fly south ___ winter.*
→ Season → in

Now list all correct answers in order:

1) at
2) in
3) on
4) in
5) At
6) In
7) on
8) at
9) on
10) in
11) in
12) on
13) On
14) at
15) in

Note: Capitalization matters only when the word starts a sentence (like #5, #6, #13). But in the original task, they wrote “In/At/On” with mixed case, so we follow standard grammar: capitalize only if it's the first word of the sentence.

Since the question asks to fill in the blanks, and the format shows options like “in/at/on”, we just pick the correct one per item.

Final Answer:
1) at
2) in
3) on
4) in
5) at
6) in
7) on
8) at
9) on
10) in
11) in
12) on
13) on
14) at
15) in