YOU SAID:
aero is the dog that lives in my house, i've owned him for 4 years.
INTO JAPANESE
エアロは私の家に住んでいる犬です、私は4年間彼を飼っています。
BACK INTO ENGLISH
Aero is a dog that lives in my house, I have kept him for four years.
INTO JAPANESE
エアロは私の家に住んでいる犬です、私は彼を4年間飼っています。
BACK INTO ENGLISH
Aero is a dog that lives in my house, I have kept him for four years.
That didn't even make that much sense in English.