YOU SAID:

Upstairs down stairs behind the stairs over the stairs no stairs

INTO JAPANESE

階段を上る 階段を上る 階段を上る 階段を下りる

BACK INTO ENGLISH

go up the stairs go up the stairs go up the stairs go down the stairs

INTO JAPANESE

階段を上る 階段を上る 階段を上る 階段を降りる

BACK INTO ENGLISH

go up the stairs go up the stairs go up the stairs go down the stairs