Includes a short summary of the usage of this expression, together with how it is formed in the affirmative, negative and interrogative.
The exercises consist of ordering sentences (with "used to") into making sense and then changing them into the negative and interrogative. The last exercise is intended to get the students speaking. It asks them to make two personal sentences about something they used to do but don't anymore and about something they did not used to do but now do. After each student writes their sentences, you can ask them to say them out loud and ask them questions about it.