肯 (kěn): Be Willing / Consent To | Chinese (Mandarin) Grammar

肯 (kěn) is the modal of consent — agreeing to actually do something, often something you might have resisted. Where 想 and 要 are about wanting, 肯 is about giving in and acting: 他肯帮忙 isn't "he wants to help," it's "he's willing to help" — the picture is of a person who could have said no and instead said yes. That resistance-then-yielding flavour is why 肯 leans so heavily negative: 不肯 is a firm, stubborn "refuses to," far stronger than a mild 不想 ("doesn't feel like"). It's a bare modal — 肯 + verb, no "to" — and it groups with the other volitional modals 敢 and 愿意.

肯: consenting to act, often against resistance

肯 + verb says the subject agrees to do the thing — frequently after being asked, pressed, or persuaded. The implication is that agreement wasn't guaranteed.

我求了他半天，他才肯帮忙。

wǒ qiú le tā bàntiān, tā cái kěn bāngmáng

I begged him for ages before he'd agree to help. (informal) — 才肯 = 'only then consented to,' after resistance.

他终于肯承认自己错了。

tā zhōngyú kěn chéngrèn zìjǐ cuò le

He's finally willing to admit he was wrong. (neutral) — 终于肯 = 'at last consented to,' overcoming reluctance.

老板肯给她加薪，说明真的很看重她。

lǎobǎn kěn gěi tā jiā xīn, shuōmíng zhēn de hěn kànzhòng tā

The boss being willing to give her a raise shows he really values her. (neutral) — 肯 = agreed to do a thing he needn't have.

💡

Hear 肯 as "willing to go along with it." The subtext is always that there was a real chance of "no." That's the difference from a plain wish: 想帮 is "wants to help," 肯帮 is "consents to help (and could have declined)."

不肯: the firm "refuses to"

Flip 肯 negative and you get outright refusal — a dug-in, won't-budge "no." This is where 肯 is most common, and it's much stronger than 不想.

孩子怎么都不肯吃药。

háizi zěnme dōu bù kěn chī yào

The child just won't take the medicine, no matter what. (informal) — 不肯 = stubborn refusal.

她不肯告诉我到底发生了什么。

tā bù kěn gàosu wǒ dàodǐ fāshēng le shénme

She refuses to tell me what actually happened. (neutral) — 不肯说 is much firmer than 不想说.

不管我说什么，他就是不肯听。

bùguǎn wǒ shuō shénme, tā jiùshì bù kěn tīng

No matter what I say, he simply won't listen. (informal) — 就是不肯 = 'flatly refuses to.'

肯 vs 愿意: consenting to act vs inner willingness

肯 and 愿意 overlap heavily — both are "be willing to" — but they stress different things. 愿意 is about inner willingness: how you feel about it, whether you'd like to. 肯 is about the act of consenting: whether you'll actually go along and do it, especially over some resistance. So someone can 愿意 (feel willing) yet 不肯 (refuse to act).

	愿意 (yuànyì)	肯 (kěn)
Stresses	inner willingness / desire	consenting to actually act
Flavour	"would be glad to"	"agrees to, though could refuse"
Gradable?	yes — 很愿意 (very willing)	no — *很肯 is wrong
Most common as	positive and negative alike	the negative 不肯 ("refuses to")

他愿意帮忙，可就是不肯出面。

tā yuànyì bāngmáng, kě jiùshì bù kěn chūmiàn

He's willing to help, but he just won't show his face in it. (neutral) — 愿意 (feels willing) vs. 不肯 (refuses to act) in one sentence.

只要你肯努力，就一定能学好。

zhǐyào nǐ kěn nǔlì, jiù yídìng néng xué hǎo

As long as you're willing to put in the work, you'll definitely master it. (neutral) — 肯努力 = actually committing to the effort.

你肯不肯借我点儿钱？

nǐ kěn bu kěn jiè wǒ diǎnr qián?

Would you be willing to lend me a little money? (informal) — A-not-A 肯不肯 asks for consent.

💡

肯 can't be scaled by 很: there's no *很肯. Willingness-as-degree ("very willing") is 很愿意. That's a clean grammatical fingerprint — 肯 is about the yes/no of consenting to act, not a feeling you can have more or less of.

Common Mistakes

1. Using 不想 for a flat refusal. 不想 is "doesn't feel like"; for a dug-in "refuses to," you need 不肯.

❌ 我问了很多次，可她不想说。

Too weak if she's refusing — 不想说 is merely 'doesn't feel like telling.' For a firm refusal, 她不肯说.

✅ 我问了很多次，可她不肯说。

wǒ wèn le hěn duō cì, kě tā bù kěn shuō

I asked many times, but she refuses to say. — 不肯 for stubborn refusal.

2. Modifying 肯 with 很. 肯 isn't gradable; "very willing" is 很愿意.

❌ 我很肯帮你。

Ungrammatical — 肯 can't take 很. Say 我很愿意帮你 or just 我肯帮你.

✅ 我很愿意帮你。

wǒ hěn yuànyì bāng nǐ

I'd be very glad to help you. — degree of willingness → 很愿意.

3. Putting a noun after 肯. 肯 is a modal — it takes a verb, never a bare noun.

❌ 他不肯钱。

Wrong — 肯 needs a verb. Say 他不肯给钱 ('refuses to give money') or 他不肯花钱 ('won't spend money').

✅ 他不肯花钱。

tā bù kěn huā qián

He won't spend the money. — 肯 + verb 花.

4. Using 不要 for "refuses to." 不要 + verb is a prohibition ("don't!"), not a report of someone's refusal.

❌ 他不要来。

Reads as 'don't come!' or 'doesn't want (a thing)' — not 'refuses to come.' For refusal, say 他不肯来.

✅ 他不肯来。

tā bù kěn lái

He refuses to come. — 不肯 reports a firm refusal to act.

Key Takeaways

肯 (kěn) is willingness as consent — agreeing to act, often over some resistance: 他肯帮忙 = "he's willing to help (and could have said no)."
Its home form is the negative 不肯 = a firm "refuses to," far stronger than 不想 ("doesn't feel like").
肯 vs 愿意: 愿意 = inner willingness (gradable, 很愿意); 肯 = consenting to act (not gradable, *很肯 is wrong). Someone can 愿意 yet 不肯.
肯 is a bare modal — 肯 + verb, no "to," never a bare noun.
For a refusal, don't reach for 不要 (a command) — use 不肯.

Now practice Chinese

Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.

Start learning Chinese→