YOU SAID:
21, can you do some for me?
INTO JAPANESE
21、何かやってもらえますか?
BACK INTO ENGLISH
21.Can you do something for me?
INTO JAPANESE
21.何かしてもらえませんか?
BACK INTO ENGLISH
21. Can I do something for you?
INTO JAPANESE
21. 何かしてあげてもいいですか?
BACK INTO ENGLISH
21. Can I do something for you?
That didn't even make that much sense in English.