Is and are deffinition

"Is" and "are" are forms of the verb "to be," which is used to indicate existence, identity, or a state of being. "Is" is the third person singular present tense form, used with singular subjects (e.g., "He is a teacher"). "Are" is the present tense form used with plural subjects and the second person singular (e.g., "They are students" and "You are a student").