YOU SAID:

He told me my fish would die, the next day, dead

INTO JAPANESE

彼は私の魚が死ぬだろう、翌日、死んでしまうだろうと私に言った

BACK INTO ENGLISH

He told me that my fish would die, the next day, would die

INTO JAPANESE

彼は私に、私の魚は死ぬだろう、次の日は死ぬだろうと言った

BACK INTO ENGLISH

He told me that my fish would die, the next day he would die

INTO JAPANESE

彼は私の魚が死ぬだろう、次の日に彼は死ぬだろうと私に言った

BACK INTO ENGLISH

He told me that my fish would die, the next day he would die