Affirmative and Negative Sentences with the Verb To Be

Use "to be" to describe states, characteristics, or identities. To form an affirmative sentence with "to be," you use the structure: subject + am/is/are + complement. Examples: - I am happy. - She is a musician. - They are coworkers. To form a negative sentence with "to be," you add "not" after the verb "to be." The structure is: subject + am/is/are + not + complement. Examples: - I am not sad. - She is not a doctor. - They are not friends. Here are the forms of "to be" based on the subject: I → am Affirmative: I am (short form → I'm) Negative: I am not (short form → I'm not) He/She/It → is Affirmative: He is / She is / It is (short form → He's / She's) Negative: He is not / She is not / It is not (short form → He/She isn't) You/We/They → are Affirmative: You are / We are / They are (short form → You're, We're, They're) Negative: You are not / We are not / They are not (short form → You/We/They aren't)