Can, could, be able to: Ability and possibility
Learn how to talk about ability and managing difficult situations.
- check_circleI can express general ability in the present and past.
- check_circleI can talk about managing to do something in a specific difficult situation.
Discover
Meet today's English in a real situation — no rules yet. Read it once and try to guess the pattern in the words in bold. Underlined words open a short definition.
Alex: Hey, you look exhausted! What happened?
Sam: I had a terrible morning. My car wouldn’t start. I could hear the engine trying, but it just wouldn’t turn over.
Alex: Oh no! Were you able to get to work on time?
Sam: Barely! I managed to catch the 8:15 bus, but it was completely packed. I couldn’t even find a seat.
Alex: That sounds stressful. Are you going to take it to the mechanic?
Sam: Yes, I called them, and they said they will be able to look at it tomorrow. I just hope it won’t cost a fortune. I’ve been trying to save money, but I haven’t been able to save much this month.
Alex: Well, let me know if you need a ride tomorrow. I can pick you up if you want.
Sam: Thanks! I was able to get a lift from Sarah for tomorrow morning, but I might need a ride back in the afternoon. I’ll let you know!
Learn
Now the rules behind what you just saw — explained simply, with examples. Underlined words open a short definition — hover on desktop, tap on a phone.
When we talk about ability and possibility, we usually use can or could. However, in specific situations, especially difficult ones, we use be able to or manage to.
General Ability
To talk about a general skill or ability, we use can (present) and could (past).
- I can play the piano. (Present ability)
- She could swim when she was five. (Past general ability)
Specific Situations and Difficulties
When we talk about success in a specific situation in the past, especially if it was difficult, we do not use could. Instead, we use was/were able to or managed to.
- The firefighter was able to save the cat from the tree.
- I lost my keys, but I managed to open the door anyway.
Common Mistake: Do not use could for a specific achievement in the past.
- ❌ I lost my passport but I could find it.
- ✅ I lost my passport but I was able to find it.
- ✅ I lost my passport but I managed to find it.
Future and Other Tenses
Because can only has a present and a past form (could), we must use be able to for other tenses like the future or present perfect.
- I will be able to help you tomorrow. (Future)
- She hasn’t been able to find a job yet. (Present perfect)
Use can and could with verbs of perception (see, hear, feel, smell, taste), even for specific situations!
- I could smell the smoke from the kitchen. (Not was able to smell)
- General ability: can (present) / could (past)
- Specific past success: was/were able to / managed to
- Future and other tenses: be able to (e.g., will be able to, have been able to)
- Perception verbs: always use can/could (I could see him)
Practice
Try it yourself. You'll see right away whether you got it right, plus a short explanation of why.
Use It
Now make the language yours in a real task. Use the prompt below — the editor keeps a simple word count, and nothing is saved or graded.
Before you finish — be honest. Can you do these now?