I've already washed my hands.

我已经洗了双手。

youdao

I've washed my hands of the whole sordid business.

我已经彻底洗手不干那种肮脏的勾当了。

youdao

I 've washed my hands so that I can help you with the cooking.

我已经洗过手，这样我就可以帮厨了。

youdao

With little time to figure out anything smarter to do, I transferred the cake to a pretty plate, washed my hands and got in the car with my husband.

WSJ: The Cake That Steals the Party