YOU SAID:

I go to school across town and I have to take the train there and back

INTO JAPANESE

私は町を横切って学校に行き、そこから電車に乗って戻らなければなりません

BACK INTO ENGLISH

I have to cross town to go to school and get back on the train from there

INTO JAPANESE

私は学校に行くために町を横断しなければならず、そこから電車に戻らなければならない

BACK INTO ENGLISH

I have to cross town to go to school and I have to get back to the train from there

INTO JAPANESE

私は学校に行くために町を横断しなければならず、そこから電車に戻らなければならない

BACK INTO ENGLISH

I have to cross town to go to school and I have to get back to the train from there