YOU SAID:

my dog ate my sister and i killed the dog

INTO JAPANESE

私の犬は私の妹を食べ、私は犬を殺した

BACK INTO ENGLISH

My dog ate my sister and I killed the dog

INTO JAPANESE

私の犬は私の妹を食べ、私は犬を殺した

BACK INTO ENGLISH

My dog ate my sister and I killed the dog