HSK 4 HSK V2
Correct

不如

/ bùrú /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202005/不如-Chinese-grammar-Cchatty-yyyy-1589851903.jpg

Formula

1
A + 不如 + B
2
A + 不如 + B + (这么/那么)+ Adjective/Verb
3
A + 不如 + B + (高, 大, 长, 多, 好, 深, 快, 亮, 便宜)
4
A 比 B 高 = B 不如 A 高

Definition

不如 indicates that one person or thing is inferior to another. Former one 不如 latter one means the former is not so good as the latter.

Example

A + 不如 + B
A + 不如 + B A + 不如 + B + (这么/那么)+ Adjective/Verb
1
Zǒu
走路
不如
kāichē
开车
kuài
  

Walking is not as fast as driving.

2
Zhège
这个
hái
女孩
不如
ge
那个
nánhái
男孩
me
那么
gāo
  

This girl is not as tall as that boy.

不如 + Positive adjective
Positive adjective: 高, 大, 长, 多, 好, 深, 快, 亮, 便宜, etc.
A + 不如 + B + (高, 大, 长, 多, 好, 深, 快, 亮, 便宜)
3
cháng
de
不如
ge
哥哥
gāo
  
  
(
zhè
这里
néng
yòng
  
ǎi
  
)

He is not as tall as his brother. (Here cannot use 矮.)

4
pǎo
de
不如
kuài
  
  
(
zhè
这里
néng
yòng
  
màn
  
)

I can't run as fast as him. (Here cannot use 慢。)

Only some limited verbs can be used as predicates after 不如
1) Verbs with Degree Complements,

2) Verbs with Optative Verb before it.
5
yīng
英语
不如
shuō
de
liú
流利
  

He can't speak English as fluent as yous.

6
不如
huì
chàng
唱歌
  

I can't sing as good as her.

There is only negative form of 不如…… while there is no affirmative form of 如…….
不如 is the negative form of 比
A 比 B 高 = B 不如 A 高
7
不如
gāo
玛丽高
  

She is not taller than Mary.

不如 and 没有 indicate comparison.
1) When 不如 acts as an adverbial, it is similar to 没有 in meaning and usage. Those two words are interchangeable mostly,

2) 不如 can act as a predicate, indicating A 没有 B 好 (A is not so good as B), while 没有 cannot be used like that.
8
不如
hǎo
  

I'm not as good as him.

Exercise

Rewrite the sentences with 不如:

 

1. 啤酒5块钱一瓶,红葡萄酒50块钱一瓶。

2. 她画得好,我画得不好。

3. 这本小说很有意思,那本小说没有意思。

4. 这座楼比那座楼高。

5. 妈妈51岁,老师45岁。

6. 姐姐学习很好,妹妹学习更好。

7. 骑车很累,坐车很舒服。

8. 这本书很厚,那本书很薄。