4.262 questions

You normally form questions with 'used to' by putting 'did' in front of the subject, followed by 'used to'. 'Wh'-questions are formed by putting the 'wh'-word at the beginning, followed by 'used to'.

• Did you used to play with your trains?
• What used to annoy you most about him?

You can form negative questions by putting 'didn't' in front of the subject, followed by the subject and 'used to'.

• Didn't they used to mind?

In more formal English, 'did' is put in front of the subject and 'not' after it, followed by 'used to'.