YOU SAID:
My dog died but i have to go to my aunts funeral
INTO JAPANESE
私の犬は死にましたが、叔母の葬式に行かなければなりません
BACK INTO ENGLISH
My dog died and I have to go to my aunt's funeral
INTO JAPANESE
愛犬が亡くなり、叔母の葬式に行かなければならない
BACK INTO ENGLISH
My dog died and I have to go to my aunt's funeral
That didn't even make that much sense in English.