English grammar worksheet focusing on the verb "to be" with various exercises.

Sure! Let’s solve each exercise step by step and explain the reasoning behind each answer.

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## Exercise 1: Complete with “am, is, are”

We use:
- am → with I
- is → with he, she, it, or singular nouns
- are → with you, we, they, or plural nouns

Answers:

1. I am very happy.
→ Subject is “I” → use “am”

2. Dana is a tall girl.
→ “Dana” is singular (she) → use “is”

3. The dogs are brown.
→ “dogs” is plural → use “are”

4. Tom and Mike are friends.
→ Two people = plural → use “are”

5. My mother is a teacher.
→ “mother” is singular → use “is”

6. The houses are old.
→ “houses” is plural → use “are”

7. Lions are big animals.
→ “lions” is plural → use “are”

8. The doctor is in the hospital.
→ “doctor” is singular → use “is”

9. I am sad today.
→ Subject is “I” → use “am”

10. They are sad today.
→ “they” is plural → use “are”

✔ Final Answers for Exercise 1:
1. am
2. is
3. are
4. are
5. is
6. are
7. are
8. is
9. am
10. are

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## Exercise 2: Choose the correct answer

This tests subject-verb agreement again.

Answers:

1. My room ___ clean.
→ “room” = singular → b. is

2. The cat ___ on the tree.
→ “cat” = singular → b. is

3. David and Robert ___ boys.
→ two people = plural → c. are

4. My grandmother ___ sick.
→ “grandmother” = singular → b. is

5. Anna ___ my sister.
→ “Anna” = singular → b. is

6. The chair ___ short.
→ “chair” = singular → b. is

7. The puppy ___ under the table.
→ “puppy” = singular → b. is

8. The pencils ___ in my bag.
→ “pencils” = plural → c. are

9. I ___ under the table.
→ “I” → a. am

10. The notebooks ___ on my desk.
→ “notebooks” = plural → c. are

✔ Final Answers for Exercise 2:
1. b
2. b
3. c
4. b
5. b
6. b
7. b
8. c
9. a
10. c

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## Exercise 3: Change into negative

To make a sentence negative with “be”, add “not” after the verb.

Examples:
- He is → He is not (or isn’t)
- They are → They are not (or aren’t)
- I am → I am not

Answers:

1. It is Monday. → It is not Monday. (or *It isn’t Monday.*)

2. Carla is 8 years old. → Carla is not 8 years old. (or *Carla isn’t 8 years old.*)

3. My father is a doctor. → My father is not a doctor. (or *My father isn’t a doctor.*)

4. This pencil is blue. → This pencil is not blue. (or *This pencil isn’t blue.*)

5. They are animals. → They are not animals. (or *They aren’t animals.*)

✔ Final Answers for Exercise 3:
1. It is not Monday.
2. Carla is not 8 years old.
3. My father is not a doctor.
4. This pencil is not blue.
5. They are not animals.

*(You can also use contractions like "isn't" or "aren't" — both are correct.)*

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## Exercise 4: Complete with the answers.

These are yes/no questions using “be”. Answer with “Yes, ___ is/are.” or “No, ___ is/are not.”

Answers:

1. Is he famous?
→ Yes, he is.

2. Is it Wednesday?
→ No, it is not. (or *it isn’t*)

3. Is Jennifer in class ??
→ Yes, she is. *(Note: “Jennifer” is female → use “she”)*

4. Is this computer new?
→ No, it is not. (or *it isn’t*)

5. Are the dogs big?
→ Yes, they are.

✔ Final Answers for Exercise 4:
1. Yes, he is.
2. No, it is not.
3. Yes, she is.
4. No, it is not.
5. Yes, they are.

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## ✔ Summary of All Answers:

Exercise 1:

1. am
2. is
3. are
4. are
5. is
6. are
7. are
8. is
9. am
10. are

Exercise 2:

1. b
2. b
3. c
4. b
5. b
6. b
7. b
8. c
9. a
10. c

Exercise 3:

1. It is not Monday.
2. Carla is not 8 years old.
3. My father is not a doctor.
4. This pencil is not blue.
5. They are not animals.

Exercise 4:

1. Yes, he is.
2. No, it is not.
3. Yes, she is.
4. No, it is not.
5. Yes, they are.

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Let me know if you’d like a printable version or further explanations! 😊