he didn't do well in the exam.he ought to have wrked hard at his _英语解答

he didn't do well in the exam.he ought to have w
rked hard at his lesson.为什么用ought to

人气：323 ℃　时间：2019-12-24 07:11:35

解答

ought to have done等于should have done
应该做某事而没有做他考得不好，他应该努力学习而没有努力学习