YOU SAID:

There is a large risk of you falling down the stairs

INTO JAPANESE

あなたが階段から落ちる大きな危険があります

BACK INTO ENGLISH

There is a big danger that you will fall from the stairs

INTO JAPANESE

あなたが階段から落ちるという大きな危険があります

BACK INTO ENGLISH

There is a great danger that you will fall off the stairs

INTO JAPANESE

あなたが階段から落ちるという大きな危険があります

BACK INTO ENGLISH

There is a great danger that you will fall off the stairs