GRAMMARTICAL POINTS FOLLOWING UNIT OF ENGLISH 6- 7 – 8 – 9GRAMMAR STRUCTURESENGLISH 9UNIT 1: A VISIT FROM A PEN PALA/> USED TO: ( tng)1/ Affirmative: S + used to + bare infinitive My father used to be a high school teacher.2/ Negative: S + didn't use to + bare infinitive ...