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

1.
做點有用的事, 幫上忙
to do something helpful or productive
:
•
Instead of just standing there, why don't you make yourself useful and help with the dishes?
與其站在那裡,不如做點有用的事,幫我洗碗吧?
•
The manager told the new intern to make himself useful by organizing the files.
經理告訴新實習生通過整理文件來做點有用的事。