YOU SAID:

only time he tuff is when he in the crowd

INTO JAPANESE

彼が凝灰岩を作るのは彼が群衆の中にいるときだけです

BACK INTO ENGLISH

He makes tuff only when he is in the crowd

INTO JAPANESE

彼は群衆の中にいるときだけ凝灰岩を作ります

BACK INTO ENGLISH

He makes tuff only when he is in the crowd