This colorful worksheet helps elementary students practice conjugating the past tense of the verb "to be" through simple fill-in-the-blank sentences.

Task: Solve the problem and explain the solution

The task involves filling in the blanks with the correct forms of "was", "were", "wasn't", or "weren't". Let's solve it step by step.

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Part 1: WAS and WERE

#### Rules for "Was" and "Were":
- Was: Used with singular subjects (e.g., I, he, she, it).
- Were: Used with plural subjects (e.g., we, you, they) or with the pronoun "you" (singular or plural).

#### Solutions:
1. Elia and Ianis _______ ill yesterday.
- Subject: "Elia and Ianis" (plural)
- Correct form: Were
- Answer: Were

2. The weather _______ very hot last Saturday.
- Subject: "The weather" (singular)
- Correct form: Was
- Answer: Was

3. Claudia _______ in Germany last summer.
- Subject: "Claudia" (singular)
- Correct form: Was
- Answer: Was

4. My brother and I _______ at the park yesterday.
- Subject: "My brother and I" (plural)
- Correct form: Were
- Answer: Were

5. Mom and Dad _______ at a restaurant last night.
- Subject: "Mom and Dad" (plural)
- Correct form: Were
- Answer: Were

6. I _______ at school this morning.
- Subject: "I" (singular)
- Correct form: Was
- Answer: Was

7. Daniela _______ born in December.
- Subject: "Daniela" (singular)
- Correct form: Was
- Answer: Was

8. Claudia and Irene _______ best friends.
- Subject: "Claudia and Irene" (plural)
- Correct form: Were
- Answer: Were

9. You _______ late for school yesterday.
- Subject: "You" (singular/plural, but context suggests singular here)
- Correct form: Were
- Answer: Were

10. We _______ at the zoo last month.
- Subject: "We" (plural)
- Correct form: Were
- Answer: Were

11. Frida _______ pretty when she _______ a baby.
- First blank: Subject is "Frida" (singular)
- Correct form: Was
- Second blank: Subject is "she" (singular)
- Correct form: Was
- Answers: Was, Was

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Part 2: WASN'T and WEREN'T

#### Rules for "Wasn't" and "Werent":
- Wasn't: Used with singular subjects (e.g., I, he, she, it).
- Werent: Used with plural subjects (e.g., we, you, they) or with the pronoun "you" (singular or plural).

#### Solutions:
1. I'm here today, but I _______ here yesterday.
- Subject: "I" (singular)
- Correct form: Wasn't
- Answer: Wasn't

2. Irene is tall now, but she _______ tall two years ago.
- Subject: "She" (singular)
- Correct form: Wasn't
- Answer: Wasn't

3. It's sunny now, but it _______ a couple of hours ago.
- Subject: "It" (singular)
- Correct form: Wasn't
- Answer: Wasn't

4. My friends are here today, but they _______ here yesterday.
- Subject: "They" (plural)
- Correct form: Werent
- Answer: Werent

5. My bedroom is clean now, but it _______ this morning.
- Subject: "It" (singular)
- Correct form: Wasn't
- Answer: Wasn't

6. The shops are open now, but they _______ last weekend.
- Subject: "They" (plural)
- Correct form: Werent
- Answer: Werent

7. I'm happy now, but I _______ two hours ago.
- Subject: "I" (singular)
- Correct form: Wasn't
- Answer: Wasn't

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Final Answers:

#### Part 1: WAS and WERE
1. Were
2. Was
3. Was
4. Were
5. Was
6. Was
7. Were
8. Were
9. Were
10. Was, Was

#### Part 2: WASN'T and WEREN'T
1. Wasn't
2. Wasn't
3. Wasn't
4. Werent
5. Wasn't
6. Werent
7. Wasn't

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Boxed Final Answer:

\[
\boxed{
\text{Part 1: 1. Were, 2. Was, 3. Was, 4. Were, 5. Was, 6. Was, 7. Were, 8. Were, 9. Were, 10. Was, Was}
}
\]
\[
\boxed{
\text{Part 2: 1. Wasn't, 2. Wasn't, 3. Wasn't, 4. Werent, 5. Wasn't, 6. Werent, 7. Wasn't}
}
\]