YOU SAID:

if they play the song she'll be depressed

INTO JAPANESE

彼らがその歌を演奏すれば、彼女は落ち込んでしまうだろう

BACK INTO ENGLISH

If they play the song, she will be depressed.

INTO JAPANESE

彼らが歌を演奏すれば、彼女は落ち込んでしまいます。

BACK INTO ENGLISH

If they play the song, she will be depressed.