一全文逐句语法解读
本课讲 be going to 表打算，must / mustn't 表要求与禁止，以及反身代词 yourself / ourselves 的用法。
¶ 1 · be going to 表打算（句 1-2）
| 句子 | 语法点 |
|---|
| What are you going to do this evening, Jill? | 打算 be going to + 动词原形，表计划要做的事 |
| I'm going to meet some friends, Dad. | meet some friends = 见几个朋友 |
¶ 2 · 要求与禁止（句 3-4、11）
| 句子 | 语法点 |
|---|
| You mustn't come home late. | mustn't 表禁止：不许晚回家 |
| You must be home at half past ten. | must 表要求；half past ten = 十点半 |
| But you mustn't come home after a quarter past eleven. | quarter past eleven = 十一点一刻 |
¶ 3 · 请求与反身代词（句 6、12、15-16）
| 句子 | 语法点 |
|---|
| Can I have the key to the front door, please? | the key to… = ……的钥匙，介词用 to |
| Do you hear? | 听清楚了吗？父亲强调要求时的说法 |
| Enjoy yourself! | 反身代词 enjoy oneself = 玩得开心 |
| We always enjoy ourselves, Mum. | 主语是 we，对应的反身代词用 ourselves |
二固定搭配与重点词组
| 短语 | 用法与例句 |
|---|
| be going to do | 打算做……。I'm going to meet some friends. |
| come home late | 晚回家。You mustn't come home late. |
| half past ten | 十点半。past 表「过」。 |
| a quarter past eleven | 十一点一刻。a quarter = 一刻钟。 |
| the key to the front door | 前门的钥匙。key to… 介词用 to。 |
| enjoy oneself | 玩得开心。Enjoy yourself! / We enjoy ourselves. |
三语法核心总结
核心语法
be going to + must / mustn't
- be going to 表打算，后面必须跟动词原形。
- 反身代词要跟主语一致：you → yourself，we → ourselves。
- key to the door：钥匙用介词 to，不用 of。
- 本课生词 8 个全部嵌入课文句子，无遗漏。