YOU SAID:

becase im going to a thing at school that starts at 5

INTO JAPANESE

学校で5時に始まることに行きます

BACK INTO ENGLISH

I will go to school to start at 5 o'clock.

INTO JAPANESE

私は5時に出発するために学校に行くでしょう。

BACK INTO ENGLISH

I will go to school to leave at 5 o'clock.

INTO JAPANESE

私は5時に出発するために学校に行くでしょう。

BACK INTO ENGLISH

I will go to school to leave at 5 o'clock.