conj.
To consent or be capable — rooted in a mouth (口) voicing agreement. But, yet, however — a pivot that turns an expectation into contrast.
可
adv.
used for emphasis; indeed; very
Common Usage & Traps
- 可是 — but; however
- 可以 — can; may
- 可能 — possible; maybe
- 可爱 — cute; adorable
- 可忙了 — really busy
- 可别忘了 — don't forget
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我可去我可以去可 alone is not the normal everyday word for permission.
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他可忙他很忙 / 他可忙了Emphatic 可 needs a strong sentence frame, often with 了.
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可但是可是 / 但是Do not stack two contrast words just to mean 'but'.
Can I replace 可以 with 可 when asking for permission?
Use 可以 for everyday permission; 可 alone usually is not a drop-in replacement.
可以 is the normal word for permission or ability in daily speech. 可 alone before a verb sounds formal, incomplete, or like the start of 可是. You can split 可以 into 可不可以 in questions, but do not drop 以 in a plain statement. If you mean 'I can help you', say 我可以帮你, not 我可帮你. The negative everyday form is 不可以; 不可 is mostly written or fixed.
| Dimension | Natural | Avoid |
|---|---|---|
| Everyday permission | 我可以去。 | 我可去。 |
| Question form | 可不可以去？ | 可去吗？ |
| Negative | 不可以去。 | 不可去。 |
| I can help you | 我可以帮你。 | 我可帮你。 |
Why does 可 sometimes mean 'but' instead of 'can'?
When 可 means 'but', it opens a sentence and flips the expectation.
可 before a clause often means 'but' or 'yet'. It works like a spoken sentence opener that says 'here is the catch'. 可是 is the common two-syllable word for 'but'; 可 alone is more dramatic or literary. If you can swap it with 但是, you are looking at the 'but' meaning, not 'can'. The same sentence can contain both: 可 as 'but' and 可以 as 'can'.
“可现在的茶馆虽然还是可以喝茶，但是去那儿的人大多不是老北京。” (But although you can still drink tea in today's teahouses, most people who go there aren't old-time Beijingers.)
“可现在的茶馆虽然还是可以喝茶，但是去那儿的人大多不是老北京。” (But although you can still drink tea in today's teahouses, most people who go there aren't old-time Beijingers.)
| Dimension | Natural | Avoid |
|---|---|---|
| Sentence-opening but | 可我没时间。 | 可以我没时间。 |
| Common but word | 可是我没时间。 | 可但是我没时间。 |
| Can meaning | 还是可以喝茶。 | 还是可喝茶。 |
| Paired contrast | 虽然...但是... | 虽然...可但是... |
Why do people say 他可忙了 instead of 他很忙?
可 before an adjective plus 了 adds strong feeling, not permission.
可 before an adjective or verb can crank up the emotion. It often pairs with 了 at the end of the sentence. 他可忙了 means 'He is really busy', not 'He can busy'. Without 了 and without a strong context, 他可忙 sounds unfinished. Use this pattern for surprise, complaint, or warnings: 你可别忘了.
| Dimension | Natural | Avoid |
|---|---|---|
| Neutral statement | 他很忙。 | 他可忙。 |
| Strong feeling | 他可忙了。 | 他很忙了。 |
| Warning | 你可别忘了。 | 你可以别忘了。 |
| Surprise | 她可高兴了。 | 她可高兴。 |
Appears in Stories 2 stories
Real context sentences across different daily scenarios and graded readings.
Why would a millionaire leave a table of lobster and wagyu untouched? This story explores the hidden rules of business dining and the true cost of staying alert.
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可 他一开口，整桌人都停下来听。
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可 直到散席，那碗汤也没再碰过。
Ever wondered where old Beijing's tea-drinking culture has gone? Follow a visitor discovering why locals now avoid famous tea houses—and practice expressing surprise and comparisons in Chinese along the way.
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可 现在的茶馆虽然还是可以喝茶，但是去那儿的人大多不是老北京。
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