но vs а
no vs a — but vs and/but contrast
Register: neutral
What it really means
Но directly contradicts or limits what came before: хотел, но не смог. А contrasts two topics or states without necessarily cancelling the first: я люблю чай, а он кофе.
Examples in natural speech
Я хотел, но не успел.
I wanted to, but did not manage.
Она устала, но довольна.
She is tired but happy.
Я люблю чай, а он кофе.
I like tea, while he likes coffee.
Не сегодня, а завтра.
Not today but tomorrow.
Он маленький, но сильный.
He is small but strong.
Common mistakes
Use но for an obstacle or contradiction; а is often a contrast of alternatives or parallel subjects.
Memory tip
Но blocks an expectation; а sets two sides beside each other.
Frequently asked questions
Which means but?
Both can, by context.
Which after не ...?
Often а: не X, а Y.
Which marks obstacle?
Но.
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