Expressing ‘to be’ with personal suffixes(‘I am a student’, etc.)

How to say “I am a student” or “I am happy” (Affirmative Statements in the Present Tense Using the Verb ‘to be’)
How to say “I am not a doctor” or “I am not sick” (Negative Statements in the Present Tense Using the Verb ‘to be’ and “değil”)
How to ask “Are you Turkish?” or “Are you a teacher?” Affirmative Yes/No Questions with the Present Tense of the Verb ‘to be’ and the Question Particle “mI”