YOU SAID:
七時 まで 帰ります。
INTO JAPANESE
七時 まで 帰ります。
BACK INTO ENGLISH
I'll be back by seven o'clock.
INTO JAPANESE
7時までに戻ります。
BACK INTO ENGLISH
I'll be back by 7 o'clock.
INTO JAPANESE
7時までに戻ります。
BACK INTO ENGLISH
I'll be back by 7 o'clock.
That didn't even make that much sense in English.