she is a secretary, he is not a welder, is he an engineer?, they are not teachers, I'm not a housewife, the cat is black, is the backpack pink?, you are not a student, I am bored, are they students?, she isn't an office worker, are you fifteen years old?, we are teachers, carol is not my friend, Is she forty-two years old?,

Verb to be: affirmative, negative and questions

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