She was so tired before the exam that she just sleepwalked through the review.

sleepwalked 是动词 sleepwalk 的过去式。sleepwalk 由 sleep（睡觉）和 walk（行走）组成，字面意思是"梦游"，引申为"机械地、无意识地做某事"。 这里用 sleepwalked through 表示"像梦游一样机械地完成"，形容复习时因过度疲劳而缺乏专注的状态。