YOU SAID:

i need to go to sleep e

INTO JAPANESE

私はeに寝る必要があります

BACK INTO ENGLISH

I need to sleep on e

INTO JAPANESE

私はeで寝る必要があります

BACK INTO ENGLISH

I need to sleep at e

INTO JAPANESE

私はeで眠る必要があります

BACK INTO ENGLISH

I need to sleep in e

INTO JAPANESE

私はeで眠る必要があります

BACK INTO ENGLISH

I need to sleep in e