The rule as a picture, 5 multiple-choice questions, 3 sentences to correct and a short writing task. Free to print and copy for your class or for self-study.
Want the explanation first? Read the Past Simple vs Past Continuous lesson
Use the Past Continuous for the longer action that was in progress, and the Past Simple for complete actions, including the short one that interrupted it: I was cooking when she called.
She called at 8.
I was cooking when she called.
Write two sentences about your own life: one with Past Simple and one with Past Continuous. Then explain the difference to a partner.
Answers will vary. Check that each sentence follows the rule on page 1, or paste them into Clarigram to have them checked.