YOU SAID:

i threw my dog down the stairs

INTO JAPANESE

私は私の犬を階段から落としました

BACK INTO ENGLISH

I dropped my dog from the stairs

INTO JAPANESE

私は階段から犬を落としました

BACK INTO ENGLISH

I dropped a dog from the stairs

INTO JAPANESE

階段から犬を落とした

BACK INTO ENGLISH

I dropped a dog from the stairs