Side-by-side comparison worksheet helping students practice the correct forms of 'to be' in present and past tenses.

This worksheet is designed to help students practice using the verbs am, is, are, was, and were in sentences. The left column ("Today") uses the present tense, while the right column ("Yesterday") uses the past tense. Below is the completed worksheet with explanations for each answer.

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Today (Present Tense)

1. I am at home.
- "Am" is used with the first-person singular pronoun "I."

2. Katie is thirsty.
- "Is" is used with the third-person singular pronoun "Katie."

3. We are bored.
- "Are" is used with the first-person plural pronoun "We."

4. My friends are tired.
- "Are" is used with the third-person plural noun "friends."

5. My cousin is 10.
- "Is" is used with the third-person singular noun "cousin."

6. Jack and I are friends.
- "Are" is used with the compound subject "Jack and I."

7. It is cold and cloudy.
- "Is" is used with the singular pronoun "It."

8. My dolls are old.
- "Are" is used with the plural noun "dolls."

9. I am in the garden.
- "Am" is used with the first-person singular pronoun "I."

10. You are very tall.
- "Are" is used with the second-person pronoun "You."

11. Your bike is red.
- "Is" is used with the singular noun "bike."

12. The windows are dirty.
- "Are" is used with the plural noun "windows."

13. Our neighbours are friendly and helpful.
- "Are" is used with the plural noun "neighbours."

14. My sister and I are both short.
- "Are" is used with the compound subject "My sister and I."

15. There is a globe in the classroom.
- "Is" is used because the subject "a globe" is singular.

16. My bedroom is big.
- "Is" is used with the singular noun "bedroom."

17. These shoes are too small for you.
- "Are" is used with the plural noun "shoes."

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Yesterday (Past Tense)

1. I was at school.
- "Was" is the past tense of "am" and is used with the first-person singular pronoun "I."

2. Katie was hungry.
- "Was" is the past tense of "is" and is used with the third-person singular pronoun "Katie."

3. We were excited.
- "Were" is the past tense of "are" and is used with the first-person plural pronoun "We."

4. My friends were relaxed.
- "Were" is the past tense of "are" and is used with the third-person plural noun "friends."

5. My cousin was 9.
- "Was" is the past tense of "is" and is used with the third-person singular noun "cousin."

6. Jack and I were friends.
- "Were" is the past tense of "are" and is used with the compound subject "Jack and I."

7. It was hot and sunny.
- "Was" is the past tense of "is" and is used with the singular pronoun "It."

8. My dolls were new.
- "Were" is the past tense of "are" and is used with the plural noun "dolls."

9. I was in the park.
- "Was" is the past tense of "am" and is used with the first-person singular pronoun "I."

10. You were sad.
- "Were" is the past tense of "are" and is used with the second-person pronoun "You."

11. Your old bike was blue.
- "Was" is the past tense of "is" and is used with the singular noun "bike."

12. The windows were clean.
- "Were" is the past tense of "are" and is used with the plural noun "windows."

13. Our neighbours were nice and kind.
- "Were" is the past tense of "are" and is used with the plural noun "neighbours."

14. My sister and I were both angry.
- "Were" is the past tense of "are" and is used with the compound subject "My sister and I."

15. There was a poster in the classroom.
- "Was" is the past tense of "is" and is used because the subject "a poster" is singular.

16. My bedroom was untidy.
- "Was" is the past tense of "is" and is used with the singular noun "bedroom."

17. These shoes were too big for you.
- "Were" is the past tense of "are" and is used with the plural noun "shoes."

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Final Answer:

- Today:
1. am
2. is
3. are
4. are
5. is
6. are
7. is
8. are
9. am
10. are
11. is
12. are
13. are
14. are
15. is
16. is
17. are

- Yesterday:
1. was
2. was
3. were
4. were
5. was
6. were
7. was
8. were
9. was
10. were
11. was
12. were
13. were
14. were
15. was
16. was
17. were

Boxed Final Answer:
\boxed{
\begin{array}{ll}
\text{Today:} & \text{Yesterday:} \\
1. \text{am} & 1. \text{was} \\
2. \text{is} & 2. \text{was} \\
3. \text{are} & 3. \text{were} \\
4. \text{are} & 4. \text{were} \\
5. \text{is} & 5. \text{was} \\
6. \text{are} & 6. \text{were} \\
7. \text{is} & 7. \text{was} \\
8. \text{are} & 8. \text{were} \\
9. \text{am} & 9. \text{was} \\
10. \text{are} & 10. \text{were} \\
11. \text{is} & 11. \text{was} \\
12. \text{are} & 12. \text{were} \\
13. \text{are} & 13. \text{were} \\
14. \text{are} & 14. \text{were} \\
15. \text{is} & 15. \text{was} \\
16. \text{is} & 16. \text{was} \\
17. \text{are} & 17. \text{were} \\
\end{array}
}