must
國小小四下/mʌst/
aux.必須；一定是
used to say that something is necessary, or that you are sure it is true
什麼時候用
must not 是「絕對不可以」，不是「不必」。「不必」是 don't have to。
常見錯誤
- You must not go = 不可以去（不是「不必去」）
- You must to go ✗ → You must go ✓
例句
You must wear a helmet.
你必須戴安全帽。
He must be tired.
他一定很累。