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 Can, Could, Be Able To lesson
Use can for ability now and could for general ability in the past: I can swim. I could swim when I was five. For one particular success in the past, use was able to or managed to: I was able to fix it. For permission and requests, can is casual, could is polite and may is formal: Could I ask a question?
Could I ask you a question?
Write three sentences of your own that use this rule. You can use these phrases.
Answers will vary. Check that each sentence follows the rule on page 1, or paste them into Clarigram to have them checked.