make yourself useful
US /meɪk jərˈsɛlf ˈjuːsfəl/
UK /meɪk jərˈsɛlf ˈjuːsfəl/

1.
做点有用的事, 帮上忙
to do something helpful or productive
:
•
Instead of just standing there, why don't you make yourself useful and help with the dishes?
与其站在那里,不如做点有用的事,帮我洗碗吧?
•
The manager told the new intern to make himself useful by organizing the files.
经理告诉新实习生通过整理文件来做点有用的事。