- All passengers must wear seat belts.
- It’s getting late. I really must go.
- Identification must be carried at all times.
［義務 → 命令］：～しなさい
- You must work hard.
- You must attend the meeting.
- You must be polite and kind in public.
［義務 → 強い勧誘］：ぜひ～してください（口語で使われる）
- You must come and stay with us in London sometime.
- You must see the Monet exhibition – it’s really wonderful.
［義務 → 禁止：否定文］：～してはいけない
- This book must not be removed from the library.
- No one must disturb him while he’s sleeping.
- You must not eat or drink in class.
［当然 → 摂理］：～するものだ（めったに使われない）
- All creatures must die.
- Animals must eat to live.
［当然 → 固執］：どうしても～しようとする（めったに使われない）
- She always must have her own way.
［推量］：～に違いない（確度が高くほぼほぼ間違いないのレベル）
- Sam must be nearly 90 years old now.
- There must be something wrong with the engine.
- you must be tired.
→ 課題 #13
→ 文法 #34 助動詞の一覧
