翻译英语"你知道这是做什么用的吗"

DO YOU KNOW WHAT IT IS FOR?
2.3.4L语法错误诶

Do you know what it is used for?

口语：
do you know how to use it?

You know what to do with the right?

do you know what it is use for?

你知道这是做什么用的吗
Do you know its usage