HSK V7-9
Correct

跟不上

/ gēnbushàng / 
Strokes

Definition

not able to keep up with

Example

As a Verb
fail to keep pace with; be unable to catch up with
1
Gēnbushàng
跟不上
xíngshì
形势

fail to keep abreast of the current situation

2
Gēnbushàng
跟不上
gōngkè
功课

cannot catch up one's lessons

As a Verb
be inferior; be not as good as
3
Tā
他
de
的
jìyìlì
记忆力
hái
还
gēnbushàng
跟不上
wǒ
我
ne
呢
  
。

His memory is not as good as mine.