exam的过去式怎么写

exam是名词，没有过去式；

exam

n.(笔头、口头或操作)考试;(对身体特定部位进行的)检查;体检；

复数 exams；

例句

Failing one exam is not the end of the world.

一次考试不及格并非世界末日。

How many students have been entered for the exam?

有多少学生报名参加考试？

One and a half hours are allowed for the exam.

考试时间为一个半小时。

Build yourself up to peak performance on the day of the exam.

好好准备在考试那天发挥出最高水平。