Cool MateCannot vs Unable
When to use each in English, with meaning, register, and examples.
| Cannot | Unable | |
|---|---|---|
| Meaning | to be unable to do something | not able to do something |
| CEFR level | A1 | B1 |
| Part of speech | adjective | |
| Usage notes | Use 'cannot' in any situation where something is impossible. Avoid using it in informal contexts where 'can't' is more common. | Use 'unable' in situations where someone or something lacks the ability to perform an action. It's appropriate in both spoken and written contexts, but avoid in very casual conversations. |
Frequently asked questions: Cannot vs Unable
What's the difference between "Cannot" and "Unable"?
"Cannot" means: to be unable to do something "Unable" means: not able to do something
When should I use "Cannot" and "Unable"?
They can all be used in everyday English.
Are "Cannot" and "Unable" the same CEFR level?
"Cannot" is at A1, "Unable" is at B1 on the CEFR scale.