When do I use 不太 vs 不很?

Always use 不太 to say 'not very' or 'not too'. 不很 is rarely natural in modern Mandarin; stick with 不太 for all degrees of softened negation.

Can I ever use 不很 in correct Chinese?

In very formal or archaic writing, you might find 不很, but in everyday language it sounds unnatural. Native speakers almost never say it. It's best to avoid it entirely.

Is 不太 the only way to soften negation in Chinese?

No, there are other patterns like 不算是 (bù suàn shì, 'not really') or 不怎么 (bù zěnme, 'not very/not much'), but for simple 'not very' before adjectives, 不太 is the most common and safest choice.

Easily confusedHSK 2

不太 vs 不很 (bú tài vs bù hěn): which 'not very' to use

不太 (bú tài) is the standard, natural way to say 'not very' or 'not too' in Mandarin Chinese, commonly used with adjectives. 不很 (bù hěn) is a grammatically possible but highly unnatural construction that learners often mistakenly create by analogy with 很; it is rarely used by native speakers and should be avoided.

Both 不太 and 不很 can theoretically be used to express 'not very' or 'not too' when negating a degree, but only 不太 is idiomatic and commonly used in modern Mandarin. 不很 is a marginal construction that native speakers rarely produce; it often sounds awkward or incomplete. Learners should default to 不太 for any situation where they want to soften a negation of an adjective or state.

When to use each

不太bú tài

not very, not too

Use 不太 as the standard, natural way to say 'not very' before adjectives or verbs that express degree. It conveys a mild, polite understatement and is extremely common in everyday speech and writing.

In some contexts, 不太 can also imply 'not quite' or 'less than expected', making it a versatile softener.

不很bù hěn

not very (rare)

Grammatically, 不很 is the negation of 很, but it is almost never used in natural Chinese. If you encounter it, it usually appears in older or highly formal text, or as an error from non-native speakers. Avoid using it in everyday conversation or writing.

At a glance

	不太	不很
Frequency of use	Very common, standard	Extremely rare, marginal
Naturalness	Idiomatic and smooth	Awkward, sounds like a direct translation
Example with adjective 好 (hǎo)	不太好 (bú tài hǎo) – 'not very good'	不很好 (bù hěn hǎo) – unnatural, avoid
Register	All registers (casual to formal)	Only appears in some written analyses; not used in speech

Examples

不太
这家餐厅的菜不太好吃。
Zhè jiā cāntīng de cài bú tài hǎochī.
The food at this restaurant is not very tasty.
Natural use of 不太 to soften negation.
不太
他不喜欢这件衣服的颜色，觉得不太合适。
Tā bù xǐhuān zhè jiàn yīfu de yánsè, juéde bú tài héshì.
He doesn't like the color of this outfit, feels it's not very suitable.
Another common use of 不太.
不太
今天不太冷，我们出去散步吧。
Jīntiān bú tài lěng, wǒmen chūqù sànbù ba.
It's not too cold today, let's go for a walk.
Expresses 'not too' with weather.
不很
他不很忙。
Tā bù hěn máng.
He is not very busy.
✗ This sentence is grammatically possible but unnatural; use 不太忙 instead.
不太
这个办法不太行。
Zhège bànfǎ bú tài xíng.
This method won't work very well.
不太 used with a stative verb (行).

Common mistakes

Using 不很 instead of 不太 to express 'not very', e.g., saying 这个不很好 instead of 这个不太好.
Treating 不很 as the standard negation of 很 in all contexts, ignoring that 不太 is the idiomatic alternative.
Using 不很 as a direct translation of 'not very' because both 不 and 很 are common words, leading to unnatural sentences.

FAQ

When do I use 不太 vs 不很?: Always use 不太 to say 'not very' or 'not too'. 不很 is rarely natural in modern Mandarin; stick with 不太 for all degrees of softened negation.
Can I ever use 不很 in correct Chinese?: In very formal or archaic writing, you might find 不很, but in everyday language it sounds unnatural. Native speakers almost never say it. It's best to avoid it entirely.
Is 不太 the only way to soften negation in Chinese?: No, there are other patterns like 不算是 (bù suàn shì, 'not really') or 不怎么 (bù zěnme, 'not very/not much'), but for simple 'not very' before adjectives, 不太 is the most common and safest choice.