This printable worksheet helps students practice identifying and using the correct definite and indefinite articles in sentences.

Let's solve this grammar exercise step by step. The task is to fill in the blanks with the correct articles: a, an, or the.

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Rules for Articles:

- "a" – used before consonant sounds (e.g., a book, a cat).
- "an" – used before vowel sounds (e.g., an apple, an hour).
- "the" – used when referring to specific or previously mentioned nouns, or unique things (e.g., the sun, the Earth).

Now let’s go through each sentence:

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1. He eats ________ apple every day.
→ "apple" starts with a vowel sound (/æ/), so we use an.
✔ an

2. I have a bag. ________ bag is big.
→ The second mention of the bag refers to the same bag already mentioned, so we use the.
✔ The

3. My father bought ________ shirt yesterday.
→ It's a general, non-specific shirt (not previously mentioned). "shirt" starts with a consonant sound (/ʃ/), so use a.
✔ a

4. The man standing at ________ door is my uncle.
→ "door" here refers to a specific door (probably the front door). We use the for specific locations.
✔ the

5. There is ________ bird on the wall.
→ A non-specific bird, first mention. "bird" starts with a consonant sound, so use a.
✔ a

6. That boy is playing with ________ umbrella.
→ A general, non-specific umbrella. "umbrella" starts with a vowel sound (/ʌ/), so use an.
✔ an

7. My mother bought a watch. ________ watch is for my father.
→ Second mention of the watch; it's now specific. Use The.
✔ The

8. The duck has laid ________ egg.
→ A single, non-specific egg. "egg" starts with a vowel sound (/ɛ/), so use an.
✔ an

9. I spend ________ hour to complete the questions.
→ "hour" starts with a silent "h", so it's pronounced /ˈaʊər/, which begins with a vowel sound. So use an.
✔ an

10. _______ Earth revolves around _______ Sun.
→ Both "Earth" and "Sun" are unique celestial bodies. We always use the before them.
✔ The, the

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✔ Final Answers:

1. He eats an apple every day.
2. I have a bag. The bag is big.
3. My father bought a shirt yesterday.
4. The man standing at the door is my uncle.
5. There is a bird on the wall.
6. That boy is playing with an umbrella.
7. My mother bought a watch. The watch is for my father.
8. The duck has laid an egg.
9. I spend an hour to complete the questions.
10. The Earth revolves around the Sun.

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✔ Explanation Summary:
- Use a/an for general, non-specific singular nouns.
- Use the for specific nouns, unique items, or when previously mentioned.
- Remember that "an" is used before words starting with a vowel *sound*, not just spelling (e.g., "hour" = /aʊər/ → an).

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