Question

the pass the important exam,i--very late every night over th

Answer 1

To pass the important exam,I (B.have been studying) very late every night over the last three months.

为了通过这一次重要的考试,这三个月以来,每个晚上我一直都学到很晚.

时间状语over the last three months（三个月以来）说明句子的时态为现在完成进行时,即从过去的某时开始,一直延续到现在,并可能在将来还延续做.