HSK V6
Correct

赶不上

/ gǎnbùshàng / 
Strokes

Definition

can't keep up with/can't catch up with/cannot overtake

Example

As a Verb

be unable to catch up with/keep pace with

1
Zhèngzhì
政治
gǎigé
改革
gǎn
赶
bù
不
shàng
上
jīngjì
经济
gǎigé
改革
de
的
bùfá
步伐
  
。

The political reform is failing to keep pace with the economic reform.

2
Gǎn
赶
bù
不
shàng
上
xíngshì
形势

fail to keep with the changing situation

As a Verb

be unable to meet with; be unable to chance upon

As a Verb

be no match (for sb/sth); unable to match