一全文逐句语法解读
本课围绕 敲门做客，重点是 anyone / anything / nothing / everything 等复合不定代词，以及 some / any / no 的用法区别。
¶ 1 · 复合不定代词（句 1、3、8、9）
| 句子 | 语法点 |
|---|
| Isn't there anyone at home? | 不定代词 anyone 用于疑问句和否定句 |
| Everything's very quiet. | everything 作主语时谓语用单数 |
| Can you see anything? | anything 用于疑问句 |
| Nothing at all. | nothing 本身含否定意义，不再加 not |
¶ 2 · some / any / no（句 9、13、15、20）
| 句子 | 语法点 |
|---|
| Everybody wants to have lunch in the garden. | everybody 作主语，谓语用单数 wants |
| Come and have something to drink. | something 用于肯定句，表“一些东西” |
| There's none left. | none = not any，表“没有了” |
| You can have some lemonade. | some 用于肯定句 |
¶ 3 · 请求与邀请（句 6、7、17）
| 句子 | 语法点 |
|---|
| Carol and Tom invited us to lunch. | invite sb. to + 名词，表“邀请某人参加……” |
| Look through the window. | through 表“穿过、透过” |
| May I have a glass of beer please? | May I…? 表请求许可，较正式 |
二固定搭配与重点词组
| 短语 | 用法与例句 |
|---|
| knock at / on the door | 敲门。I'll knock again. |
| invite sb. to + 名词 | 邀请某人参加……。invite us to lunch。 |
| look through the window | 透过窗户看。 |
| none left | 一点也不剩。There's none left. |
| Don't believe her. | 别信她的话。 |
| She's only joking. | 她只是开玩笑。 |
三语法核心总结
核心语法
复合不定代词 / some, any, no
- 由 some / any / no / every 与 -one / -thing 组成的复合不定代词作主语时，谓语用单数。
- anyone / anything 多用于疑问句和否定句，someone / something 多用于肯定句。
- nothing / no one 本身含否定意义，句中不再加 not。
- 本课生词 10 个全部嵌入课文句子，无遗漏。