How do you spell can, can't, and cannot? (with examples)

If you searched “how do you spell can” or “how to spell can’t”, here are the correct spellings in one place, with examples and the most common mistakes to avoid.

Quick answer

• can - c-a-n
• can’t - c-a-n-’-t (with an apostrophe between n and t)
• cannot - one word: c-a-n-n-o-t (not “can not”)

How to spell “can”

can - three letters: c-a-n.

Used to talk about ability or permission in the present.

Examples:

• I can help you.
• Can you hear me?

How to spell “can’t”

can’t - five characters: c, a, n, apostrophe, t.

It’s the short form of “cannot”. The apostrophe is required - it sits between “n” and “t”.

Examples:

• I can’t join the meeting today.
• She can’t find her keys.

Quick check: if you wrote “cant” (no apostrophe), that’s a different English word meaning insincere talk. For the negative of “can”, always write can’t.

How to spell “cannot”

cannot - one word, six letters: c-a-n-n-o-t. Two n’s in the middle.

In modern written English, “cannot” is preferred as a single word. “Can not” (two words) is grammatically possible but rare, and usually only used for emphasis (“You can not, under any circumstances, leave”).

Examples:

• I cannot confirm this yet.
• We cannot ship orders to that country.

cant vs can’t (the difference)

These look almost the same but mean different things:

• cant (no apostrophe) - insincere or hypocritical language; also a slope or tilt. Rare in everyday English.
• can’t (with apostrophe) - short for “cannot”. This is the one you almost always want.

If you’re writing the negative of “can”, you need the apostrophe: can’t.

“can not” vs “cannot” - which is correct?

In almost every case, write cannot as one word.

Use “can not” (two words) only when “not” belongs to another phrase, for example: “I can not only sing but also dance.” Here “not only… but also” is the structure - it’s not the negative of “can”.

Common spelling mistakes to avoid

• Writing can not when you mean cannot.
• Missing the apostrophe in can’t (writing “cant” instead).
• Adding an extra apostrophe: ca’nt is wrong - the apostrophe goes between n and t.
• Writing canot with one n - it’s always two n’s: cannot.

Practice these out loud

Spelling sticks faster when you also hear and say the word. Try reading these short sentences out loud, then write them from memory:

1. I can swim, but I can’t dive.
2. She cannot come today - she’s at work.
3. We can’t stay long, but we can call you later.

If you want consistent speaking practice with instant feedback on pronunciation and grammar, you can try a free conversation with Eli, an AI English coach - daily sessions are how spelling, grammar, and confidence settle in together.