Как правильно  вставить am, am not,is, isn't,are, aren't

I- am He- is She- is It- is You- are We- are They- are Пример i am a pupil He is a pilot We are students You are a teacher They are workers Not- отрицательная частица. Ставится после глаголов am,is,are и строит отрицательное предложение: I am not a pilot You are not a student He is not a doctor We are not workers Часто в отрицательных предложения употребляется сокращенная форма глагола : Is not- isn't Are not- aren't Am not- aren't