YOU SAID:

someone killed my cat and someone killed my dog and someone killed my cat and

INTO JAPANESE

誰かが私の猫を殺し、誰かが私の犬を殺し、誰かが私の猫を殺し、

BACK INTO ENGLISH

Someone killed my cat, someone killed my dog, someone killed my cat,

INTO JAPANESE

誰かが私の猫を殺した、誰かが私の犬を殺した、誰かが私の猫を殺した、

BACK INTO ENGLISH

Someone killed my cat, someone killed my dog, someone killed my cat,