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1 My father is a worker.My father isn't a worker.Is my father a worker? My father is a worker, isn't he? 2 he is an engineer now.Is he an engineer now? He isn't a worker now.He is a worker, isn't he? 3 These children are little.Are these children little? These children are little, aren't they? These children aren't little. 4 You are my best friend.You aren't my best friend.Are you my best friend? You are my best friend, aren't you? 5 Your daugter is a pupil. Your daughter isn't a pupil.Are your daughter a pupil? Your daughter is a pupil, isn't she? 6 I am a studen.I amn't a student.Are you a student? I am a student, amn't I? 7 They are good boys.They aren't good boys.Are they good boys? They are a good boy, aren't they? 8Our mother is a teacher.Is our mother a teacher? Our mother is a teacher, isn't she? Our mother isn't a teacher.