YOU SAID:

I was very sad when my dog died.

INTO JAPANESE

私の犬が亡くなったとき、私はとても悲しかったです。

BACK INTO ENGLISH

I was very sad when my dog passed away.

INTO JAPANESE

愛犬が亡くなったとき、とても悲しかったです。

BACK INTO ENGLISH

I was very sad when my dog passed away.