YOU SAID:

I should sleep; sleep; sleep 'til the day is done,

INTO JAPANESE

寝なきゃ;睡眠;一日が終わるまで眠る、

BACK INTO ENGLISH

I have to sleep; sleep; sleep until the end of the day,

INTO JAPANESE

私は寝なきゃ;睡眠;一日の終わりまで寝て、

BACK INTO ENGLISH

I have to sleep; sleep; sleep until the end of the day,