YOU SAID:

my exams start tomorrow and i have not revised

INTO JAPANESE

私の試験は明日始まり、私は改訂していない

BACK INTO ENGLISH

My exam starts tomorrow and I haven't revised it

INTO JAPANESE

私の試験は明日始まり、改訂していない

BACK INTO ENGLISH

My exam starts tomorrow and has not been revised

INTO JAPANESE

私の試験は明日始まり、改訂されていない

BACK INTO ENGLISH

My exam starts tomorrow and has not been revised