Must 这个字表示”必须”是最常见的用法,但要注意的是,和其他也表示”必须“的助动词比较,例如 have / has to,must 的语气更为强烈,态度更坚定、表示”一定要、务必”。否定形式为 must not / mustn’t,表示 “绝对不可以、不准、禁止” 。
We must finish the work by six o’clock this afternoon.
我们务必要在今天下午6点前完成这项工作
All of the people must follow the rules.
所有人都必须遵守法律
You mustn’t tell anybody the secret.
你不准告诉任何人这个秘密
You must not violate the law.
你绝不可以违法
Must 的另外一个意思是 “可能”、”一定是”、”想必”,为合理、有根据、符合逻的推测推论,不是随便猜一猜,但不是百分之百确定。
Ed is yawning. He must be sleepy.
Ed一直打哈欠,他一定困了
Jeff has been driving all day. He must be tired.
Jeff 开了一天的车,他可能很累了
Susan plays tennis every day. She must like to play tennis.
Susan 每天打网球,她一定很喜欢网球
Judy ate everything on her plate except the onions. She must not like onions.
盘子里的食物,除了洋葱之外Judy 全都吃光了, 想必她不喜欢洋葱