Unit 2.1

Grammar 2.1
Used to

Affirmative                                                                  Negative
I/You/He, etc. Used to walk to school.                          I/You/He, etc. Didn't use to live in a tall building.

Question/Short answers

Did I/You/He, etc. Use to grow food? Yes, I/You/He, etc., did.  No, I/You/He, etc, Didn't.

We use Used to for past habits and routines.