To make negatives and questions in the past simple, we use the auxiliary did / didn't, plus the main verb always goes back to its base form.
Choose the correct negative or question form for each sentence.
For negatives and questions in the past simple, we use the auxiliary verb did. The most important rule: after did / didn't, the main verb always returns to its base form, even if it is an irregular verb.
Start with Exercise 1 to practise recognising correct forms, then move to Exercise 2 to transform sentences yourself.