What is the Modal Verb Can?
The modal verb 'can' is one of the most common modals in English. It expresses ability ('I can run'), possibility ('It can rain'), and permission ('You can go'). Learn its forms and uses.
Can expresses ability, possibility, or permission in the present. 'Can' becomes 'could' in the past or conditional.
Step-by-step worked examples
Can you speak French?
Here, 'can' asks about ability. Answer: 'Yes, I can speak French' or 'No, I cannot.'
This fruit can last two weeks if kept cold.
'Can' expresses possibility or capability in specific conditions.
Can I use your pen?
Here, 'can' politely requests permission. Answer: 'Yes, you can.'
Flashcards
Quick quiz
Q1.Which use of 'can' is correct? 'She can run fast.'
Q2.What is the negative of 'can'?
Q3.Past form of 'can': 'He ___ speak three languages as a child.'
Q4.'Can you help me?' is an example of…
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Common mistakes
Confusing 'can' (ability now) with 'could' (ability then). — Correct: Use 'can' for present, 'could' for past or conditional.
Using 'can' for must or should. — Correct: 'Can' is about ability/permission, not obligation.
'Can I to go home?' — Correct: 'Can I go home?' — no 'to' after modal.
Using double negatives like 'cannot can't' — Correct: Use only one: 'cannot' or 'can't'.
FAQ
What is the modal verb can?
Can expresses ability ('I can swim'), possibility ('It can happen'), and permission ('You can leave').
Can can be used in the past?
No, use 'could' for past. 'I could run fast when I was young.'
What is the negative of can?
'Cannot' or 'can't' both work. 'I cannot/can't swim.'
Difference between 'can' and 'may'?
'Can' is ability; 'may' is formal permission. 'I can do it' vs. 'May I sit?' (formal)