English grammar worksheet focusing on articles (a, an, the, or none), with a playful duck illustration and practice sentences.

To solve the problem, we need to determine the correct article (definite "the," indefinite "a/an," or none) for each sentence. Here's the step-by-step explanation and solution:

Rules for Articles:

1. Definite Article ("the"):
- Used when referring to a specific or known noun.
- Example: "I saw the book you left on the table."

2. Indefinite Article ("a" or "an"):
- Used when referring to a general or non-specific noun.
- "A" is used before consonant sounds.
- "An" is used before vowel sounds.
- Example: "I bought a new car."

3. No Article:
- Used with plural nouns or uncountable nouns when they are general.
- Example: "I love music." (uncountable noun)

Solution:

Let's analyze each sentence:

1. I saw ____ duck walking down the street.
- This refers to a specific duck, so use "the."
- Answer: the

2. ____ yellow car sped past.
- This refers to any yellow car, so use "a."
- Answer: a

3. I ordered ____ pizza you asked for.
- This refers to a specific pizza that was requested, so use "the."
- Answer: the

4. Tim gave me ____ birthday card.
- This refers to a specific birthday card, so use "the."
- Answer: the

5. Let me give you ____ example.
- This refers to a general example, so use "an."
- Answer: an

6. Here’s ____ money I owe you.
- "Money" is an uncountable noun, so no article is needed.
- Answer: none

7. That is ____ dog I told you about.
- This refers to a specific dog mentioned earlier, so use "the."
- Answer: the

8. Pick ____ chair and sit down.
- This refers to any chair, so use "a."
- Answer: a

9. ____ plane I flew on was big.
- This refers to a specific plane, so use "the."
- Answer: the

10. Finally, ____ sun came out.
- "Sun" is a unique noun, so use "the."
- Answer: the

11. It has been ____ long afternoon.
- This refers to a specific afternoon, so use "a."
- Answer: a

12. I am looking forward to ____ weekend.
- This refers to a specific upcoming weekend, so use "the."
- Answer: the

13. Tonight, we are having ____ nachos.
- "Nachos" is a plural noun, so no article is needed.
- Answer: none

Final Answers:

1. the
2. a
3. the
4. the
5. an
6. none
7. the
8. a
9. the
10. the
11. a
12. the
13. none

Boxed Answer:

\[
\boxed{
\text{1. the, 2. a, 3. the, 4. the, 5. an, 6. none, 7. the, 8. a, 9. the, 10. the, 11. a, 12. the, 13. none}
}
\]