Grammar worksheet focusing on using "is," "am," and "are" correctly in sentences.

To solve the problem, we need to fill in the blanks with the correct form of the verb "to be" (is, am, or are) based on the subject of each sentence. Here's the step-by-step solution:

Grammar Rule Recap:

- "is" is used with singular subjects (e.g., he, she, it, a noun).
- "am" is used with the first-person singular pronoun "I."
- "are" is used with plural subjects (e.g., they, we, you, multiple nouns).

Solution:

1. She ______ beautiful.
- Subject: "She" (singular)
- Correct form: is
- Sentence: She is beautiful.

2. I ______ a girl.
- Subject: "I" (first-person singular)
- Correct form: am
- Sentence: I am a girl.

3. Me and my mom ______ good friends.
- Subject: "Me and my mom" (plural, as it refers to two people)
- Correct form: are
- Sentence: Me and my mom are good friends.

4. We ______ a happy family.
- Subject: "We" (plural)
- Correct form: are
- Sentence: We are a happy family.

5. The school bell ______ ringing.
- Subject: "The school bell" (singular)
- Correct form: is
- Sentence: The school bell is ringing.

6. I ______ happy.
- Subject: "I" (first-person singular)
- Correct form: am
- Sentence: I am happy.

7. You ______ short.
- Subject: "You" (can be singular or plural, but here it is singular)
- Correct form: are
- Sentence: You are short.

8. The cat ______ white.
- Subject: "The cat" (singular)
- Correct form: is
- Sentence: The cat is white.

Final Answer:

1. She is beautiful.
2. I am a girl.
3. Me and my mom are good friends.
4. We are a happy family.
5. The school bell is ringing.
6. I am happy.
7. You are short.
8. The cat is white.

Boxed Answer:
\[
\boxed{
\begin{array}{l}
1. \text{is} \\
2. \text{am} \\
3. \text{are} \\
4. \text{are} \\
5. \text{is} \\
6. \text{am} \\
7. \text{are} \\
8. \text{is}
\end{array}
}
\]