verb

"Be" is a versatile verb in the English language that can be used as a main verb, auxiliary verb, or linking verb.

As a main verb, it is used to describe a state or condition, such as "I am happy."

As an auxiliary verb, it is used to form various tenses, moods, and voices, such as "She is singing."

As a linking verb, it connects the subject of a sentence to additional information about the subject, such as "She appears tired."

Overall, the verb "be" can express existence, identity, and relationship between entities.

Example

1. "The sky is blue." (linking verb)
2. "She is reading a book." (auxiliary verb)
3. "I am a student." (main verb)