YOU SAID:
How could you do this?
INTO JAPANESE
どうすればこれができますか?
BACK INTO ENGLISH
How can I do this?
INTO JAPANESE
これどうやってするの?
BACK INTO ENGLISH
how do you do this
INTO JAPANESE
これはどうやるんですか
BACK INTO ENGLISH
how do you do this
That didn't even make that much sense in English.