不怎么 and 不怎么样 look very similar, but they are used differently.
Compare:
我不怎么喝咖啡。
I don’t drink coffee very often.
这家咖啡店不怎么样。
This coffee shop isn’t very good.
The difference is simple:
不怎么 → not very / not much / not often
不怎么样 → not very good / so-so
1. 不怎么: Not Very / Not Much / Not Often
不怎么 usually comes before a verb or adjective.
Structure
不怎么 + Verb / Adjective
我平时不怎么喝咖啡。
I don’t drink coffee very often.
他最近不怎么运动。
He hasn’t been exercising much recently.
这里冬天不怎么冷。
It isn’t very cold here in winter.
我对这个话题不怎么了解。
I don’t know much about this topic.
So 不怎么 usually shows a low degree, amount, or frequency.
It can also make a negative statement sound less absolute:
我不喜欢这本书。
I don’t like this book.
我不怎么喜欢这本书。
I don’t really like this book.

2. 不怎么样: Not Very Good / So-So
不怎么样 is usually used to give a negative evaluation.
It can mean:
not very good / not great / so-so
这家餐厅不怎么样。
This restaurant isn’t very good.
这部电影不怎么样。
This movie is nothing special.
我今天感觉不怎么样。
I’m not feeling very well today.
Unlike 不怎么, 不怎么样 can complete a sentence by itself.

3. Verb + 得 + 不怎么样
You can also use 不怎么样 to evaluate how well someone does something.
Structure
Verb + 得 + 不怎么样
他唱得不怎么样。
He doesn’t sing very well.
他中文说得不怎么样。
He doesn’t speak Chinese very well.

4. Compare Them
他平时不怎么说中文。
He doesn’t speak Chinese very often.
👉 不怎么 describes frequency.
他中文说得不怎么样。
He doesn’t speak Chinese very well.
👉 不怎么样 evaluates his speaking ability.
Another useful comparison:
这家餐厅不怎么贵。
This restaurant isn’t very expensive.
这家餐厅不怎么样。
This restaurant isn’t very good.
One describes degree.
The other gives an evaluation.

Quick Summary 🌟
不怎么 + Verb / Adjective
→ not very / not much / not often
我最近不怎么忙。
I haven’t been very busy recently.
不怎么样
→ not very good / not great / so-so
这个地方不怎么样。
This place isn’t very good.
Easy way to remember:
不怎么 + something
but
不怎么样 = an evaluation
Just one extra 样 (yàng), but a very different meaning. 😊