例句
You must wear a helmet when riding here.
在这里骑车必须戴头盔。
Governments must ensure that all children have access to quality education, regardless of their family income.
政府必须确保所有儿童都能接受优质教育，不论其家庭收入如何。
常用搭配
- must be｜一定是
- must have done｜想必已经做过
- an absolute must｜绝对必需的事物
用法提示
must是情态动词；mustn't表禁止，不是“不必”。