YOU SAID:

i have to go to schoool

INTO JAPANESE

私は学校に行かなければなりません

BACK INTO ENGLISH

I have to go to school

INTO JAPANESE

私は学校へ行かなければならない。

BACK INTO ENGLISH

I have to go to school.

INTO JAPANESE

私は学校へ行かなければならない。

BACK INTO ENGLISH

I have to go to school.