Repairing tyres was a skill; starting a difficult engine was one achievement. English often distinguishes these. Could describes general past ability, while managed to highlights success despite difficulty.

The idea

Use could + base verb for past ability. Negate with couldn't and put could before the subject in questions. For a particular completed achievement, usually choose was/were able to or managed to + base verb.

Examples

  • At twelve, I could repair a bicycle tyre.
  • We couldn't unlock the gate yesterday.
  • After three attempts, Sara managed to start the engine.
  • Could you read music when you joined the band?
  • From the balcony, I could see the ferry.
  • The technician was able to recover the file before lunch.

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Watch out

The distinction is not an absolute ban on could for single occasions: couldn't can describe one failure, and could see/hear/understand can describe one experience. Past ability also does not prove the ability has disappeared now.

Try it yourself

  1. Choose the correct option. At twelve, I could ___ a bicycle tyre. (repair / to repair)

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    repair

    After could, use the base form repair, without to.

  2. Choose the correct option. We ___ unlock the gate yesterday. (couldn't / didn't could)

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    couldn't

    Couldn't forms the negative directly; didn't could is not the pattern.

  3. Choose the correct option. After three attempts, Sara managed ___ the engine. (to start / starting)

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    to start

    Manage takes to + base verb: managed to start reports success.

Use it today

Describe one childhood skill, one thing you could not do yesterday, and one difficult task you successfully completed. Use managed to for the last, and explain what made it difficult.