1tom is a teacher. tom isn't a teacher. is tom a teacher. tom was a teacher. tom wasn't a teacher. was tom a teacher. tom will be a teacher. tom won't be a teacher. will tom be a teacher.2you are my schoolmate. you aren't my schoolmate. are you my schoolmate. you were my schoolmate. you weren't my schoolmate. were you my schoolmate. you will be my schoolmate. you won't be my schoolmate. will you be my schoolmate