YOU SAID:

I was going to go to class before I got high

INTO JAPANESE

ハイになる前にクラスに行くつもりだった

BACK INTO ENGLISH

I was going to class before I got high

INTO JAPANESE

ハイになる前に授業に行っていた

BACK INTO ENGLISH

I went to class before I got high

INTO JAPANESE

ハイになる前にクラスに行った

BACK INTO ENGLISH

I went to class before I got high