You mustn’t tell him about it.
你一定不
要把这件事告诉他。
在否定结构中:don’t have to 表示 “不必”, mustn’t
表示“禁止”。
小结have to和must 两词都是 “必须”的意思, have to 表示客观的
需要, must 表示说话人主观上的看法, 既主 观上的必要。
Setion Ⅲ
Can Peter come in and have tea?
Questions on the text
❖Does Susan have tea by herself?
video
Language points
1. Can't you come in and have tea now, Peter? 这是否定疑问句,表示邀请。
疑问句
❖ She doesn’t need to/ have to leave early. She needn’t leave early.
否定句
snow heavily must have to
stay at home
It is snowing very hard , so I have to stay at home. …, so I don’t have to / don’t need to meet Alice .
❖ can’t you …. 表示说话人希望听话人做某事的强烈意愿和看法。 例 Can’t you come and help me? 你就不能来帮帮我吗?
2. I must water the garden first. 3. Do you have to water it now? 4. It’s terribly dry. 5. Don't you remember?