Complete the following sentences using the correct form of 'used to', 'didn't use to', or 'Did you use to' and the verb in parentheses. Pay attention to whether the sentence is positive, negative, or a question.
Hint: Remember to use "used to" for positive statements, "didn't use to" for negative statements, and "Did (subject) use to" for questions. The verb that follows is always in its base form.