GRAMMAR HELP BOX. Verb “ to be”
1. Negative forms:
He isn´t an accountant. You aren´t British.
But: I´m not a journalist. NOT
2. Short answers to Yes / No questions:
Is John British? Yes, he is. (He = John)
Is his surname Bratt? No, it isn´t. (it = surname)
Are you a teacher? No, I´m not. / Yes, I am.