YOU SAID:

Floors must be mopped at end of the day.

INTO JAPANESE

一日の終わりに床を拭く必要があります。

BACK INTO ENGLISH

Floors should be mopped at the end of the day.

INTO JAPANESE

一日の終わりに床をモップで拭く必要があります。

BACK INTO ENGLISH

Floors should be mopped at the end of the day.