YOU SAID:
why do we have to go to school
INTO JAPANESE
なぜ我々 は学校に行かなければならないか
BACK INTO ENGLISH
Why do we have to go to school?
INTO JAPANESE
我々 はなぜ学校に行かなければならないのですか。
BACK INTO ENGLISH
That's why we have to go to school?
INTO JAPANESE
だからこそ私たちは学校に行かなければならないか。
BACK INTO ENGLISH
That's why we have to go to school.
INTO JAPANESE
だからこそ私たちは学校に行かなければなりません。
BACK INTO ENGLISH
That's why we have to go to school.
That didn't even make that much sense in English.