Students can practice their grammar skills by identifying gerunds in these twelve sentences, ranging from "Bowling is fun" to "Juggling can be difficult."

Task: Identify the gerund or gerunds in each sentence.

#### What is a gerund?
A gerund is a verb form that ends in -ing and functions as a noun. It can be used as the subject, object, or complement of a sentence. Examples include "swimming," "dancing," "laughing," etc.

#### Instructions:
Circle the gerund or gerunds in each sentence below.

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Solutions:

1. Bowling is one of my favorite sports.
- Gerund: Bowling
- Explanation: "Bowling" is the subject of the sentence and functions as a noun.

2. Smiling is a good way to start your day.
- Gerund: Smiling
- Explanation: "Smiling" is the subject of the sentence and functions as a noun.

3. Mrs. Stevens teaches writing.
- Gerund: Writing
- Explanation: "Writing" is the object of the verb "teaches" and functions as a noun.

4. My favorite chores are sweeping and mopping.
- Gerunds: Sweeping, Mopping
- Explanation: Both "sweeping" and "mopping" are objects of the verb "are" and function as nouns.

5. Molly won a gold medal in skating.
- Gerund: Skating
- Explanation: "Skating" is the object of the preposition "in" and functions as a noun.

6. Sneezing is a sign that you may have a cold.
- Gerund: Sneezing
- Explanation: "Sneezing" is the subject of the sentence and functions as a noun.

7. Sam loves drawing and painting.
- Gerunds: Drawing, Painting
- Explanation: Both "drawing" and "painting" are objects of the verb "loves" and function as nouns.

8. Brushing your teeth daily is a good habit.
- Gerund: Brushing
- Explanation: "Brushing" is the subject of the sentence and functions as a noun.

9. Games that require a lot of thinking are fun.
- Gerund: Thinking
- Explanation: "Thinking" is the object of the verb "require" and functions as a noun.

10. Mr. Williams likes to finish his baking before noon.
- Gerund: Baking
- Explanation: "Baking" is the object of the infinitive "to finish" and functions as a noun.

11. Sometimes working can be as much fun as playing.
- Gerunds: Working, Playing
- Explanation: Both "working" and "playing" are subjects of the verb "can be" and function as nouns.

12. Juggling can be difficult to do.
- Gerund: Juggling
- Explanation: "Juggling" is the subject of the sentence and functions as a noun.

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Final Answer:

1. Bowling
2. Smiling
3. Writing
4. Sweeping, Mopping
5. Skating
6. Sneezing
7. Drawing, Painting
8. Brushing
9. Thinking
10. Baking
11. Working, Playing
12. Juggling

Boxed Final Answer:
\boxed{
\text{1. Bowling, 2. Smiling, 3. Writing, 4. Sweeping, Mopping, 5. Skating, 6. Sneezing, 7. Drawing, Painting, 8. Brushing, 9. Thinking, 10. Baking, 11. Working, Playing, 12. Juggling}
}