Grammar: “BE”: Singular statements and contractions [= short forms] and [+/- forms]   I’m Saba. [+]   → I’m not Janet [-]  I’m >>> I am   You’re a student. [+] → You’re not a nurse. [-] You’re >>> You are   You aren’t an engineer. [-] aren’t >>> are not   He’s a doctor. [+] → He’s not a teacher. [-] He’s >>> He is    He isn’t …

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