YOU SAID:
bro i fell down the stairs
INTO JAPANESE
兄弟、私は階段から落ちました
BACK INTO ENGLISH
brother i fell down the stairs
INTO JAPANESE
兄さん、階段から落ちました
BACK INTO ENGLISH
brother fell down the stairs
INTO JAPANESE
兄は階段から落ちた
BACK INTO ENGLISH
brother fell down the stairs
That didn't even make that much sense in English.