交流表达-037.Obligation
时间：2018-12-26 作者：英语课 分类：交流方式的多种表达
英语课
义务Obligation
You must.
You have to .
You’ve got to
You will be required to
You are expected to
You are required to
You’d better
You ought to clear your dictionary
You should give your seat to the old.
You’re under an obligation to