Make yourself useful让你有用起来的意思。
例句：
Make yourself useful, ok? Go clean the garage
你能不能不闲着，把车库打扫一下。
I visit my friend and she’s cooking dinner for me. So I ask her, “Well Leez, can I make myself useful?”
我去朋友家，她做饭给我吃，于是我问她：“我能帮上什么忙吗？”
更多例句：
1. Don't stand about doing nothing-make yourself useful!
别闲呆着-做点有用的事！
2. "Stop daydreaming, wake up, stand up, and go out make yourself useful."
"别再做白日梦，醒过来，站起来，走出去，做个有用的人。"
3. Don't just sit there watching television—make yourself useful. Come and help us move these tables.
别只是光坐著看电视，让你自己有点作用。过来帮我们搬那些桌子。