YOU SAID:

I threw my father down the stairs his hat.

INTO JAPANESE

私は階段を私の父に彼の帽子を投げた。

BACK INTO ENGLISH

I threw up the stairs his hat to my father.

INTO JAPANESE

私は階段を私の父に彼の帽子を投げた。

BACK INTO ENGLISH

I threw up the stairs his hat to my father.