Complete the sentences with the correct form (full or short) of the verb to be

1. The boys _______ playing soccer in the park.
To complete this sentence, we need to use the correct form of the verb "to be." Since "the boys" is plural, we should use the plural form of the verb. The correct form is "are." Therefore, the sentence should read: "The boys are playing soccer in the park."

2. I _______ not happy with my test results.
In this sentence, we need to use the correct form of the verb "to be" to describe the subject "I." The negative form of "I am" is "I am not." Therefore, the sentence should read: "I am not happy with my test results."

3. Sarah and Tom _______ brother and sister.
In this sentence, we have two subjects, "Sarah" and "Tom," joined by "and." Since they are talking about both individuals, we must use the plural form of the verb "to be." The correct form is "are." Therefore, the sentence should read: "Sarah and Tom are brother and sister."

4. It _______ sunny outside today.
In this sentence, we are talking about the weather, which is considered as a singular subject. Therefore, we need to use the singular form of the verb "to be." The correct form is "is." Therefore, the sentence should read: "It is sunny outside today."

5. You _______ my best friend.
In this sentence, we are talking directly to the subject "you." When addressing someone in the second person, we use the same form of the verb "to be" as for the plural subjects. Therefore, the correct form is "are." Therefore, the sentence should read: "You are my best friend."

6. We _______ going to visit our grandparents tomorrow.
In this sentence, we have the pronoun "we," which indicates multiple individuals. Therefore, we need to use the plural form of the verb "to be." The correct form is "are." Therefore, the sentence should read: "We are going to visit our grandparents tomorrow."

7. The book _______ on the table.
In this sentence, we are talking about the location of the book, which is considered a singular subject. Therefore, we need to use the singular form of the verb "to be." The correct form is "is." Therefore, the sentence should read: "The book is on the table."

8. They _______ not here right now.
In this sentence, we are talking about multiple individuals who are not present. We need to use the plural form of the verb "to be" and the negative form "not." The correct form is "are not." Therefore, the sentence should read: "They are not here right now."

I hope this detailed explanation helps you understand how to use the verb "to be" in different sentences. Let me know if you have any further questions.