Eng: Ought to...

要

Ask for, Blackmail, Brief, Coerce, Demand, Engage, Essential, Examine, If, Important, In case, Investigate, Invite, Make an, Midriff, Necessary, Necessity, Need, Ought to, Require, Shall, Should, Stop, Summarize, Summary, Threaten, Waist, Want, Will

應該

Must, Ought to, Should