YOU SAID:

Did that piano just play itself

INTO JAPANESE

あのピアノはただ弾くだけだったのか

BACK INTO ENGLISH

Was that piano just playing?

INTO JAPANESE

あのピアノはただ弾いていただけなの?

BACK INTO ENGLISH

Was he just playing that piano?

INTO JAPANESE

彼はただそのピアノを弾いていただけなのでしょうか?

BACK INTO ENGLISH

Was he just playing the piano?

INTO JAPANESE

彼はただピアノを弾いていただけなのでしょうか?

BACK INTO ENGLISH

Was he just playing the piano?