九年级英语上Unit语法used to do 用法PPT学习教案.pptx

【知识点详解】 1. **used to do sth.** 的基本用法： - `used to do sth.` 表示过去经常做某事，但现在不再做了，具有对比现在的情况之意。 - 它适用于所有的人称，动词 `used` 后接动词原形。 - 肯定句：`used to + 动词原形`，例如：`I used to get up late.` - 否定句：`didn't use to / usedn't to + 动词原形`，例如：`I didn't use to exercise.` - 一般疑问句：`Did + 主语 + use to do sth.?` 或 `Used + 主语 + to do sth.?`，例如：`Did you use to play basketball?` - 答复：肯定回答 `Yes, sb. did.` 或 `Yes, sb. used to.`；否定回答 `No, sb. didn't.` 或 `No, sb. usedn't to.` 2. **反意疑问句**： - 对于 `used to do sth.` 结构的反意疑问句，遵循“前肯后否、前否后肯”原则，例如：`Bob used to like pop music, didn't he?` 3. **be/get/become used to doing sth.**： - 表示习惯于做某事，强调现在对某一行为的适应，`to` 后接动名词。 - 例如：`She is used to getting up early.` 4. **sth. be used to do sth.**： - 意为某物被用来做某事，强调物品的功能或用途。 - 例如：`Wood is used to make furniture.` 5. **练习题解析**： - 1. `Her brother used to (play) basketball.` - 正确答案：`play` - 2. `Mom used to (get) up early.` - 正确答案：`get` - 3. `Wood is used (to make) desks, chairs, tables and so on.` - 正确答案：`to make` - 4. `(Did) he (use) to be short?` - 正确答案：`Did, use` - 5. `Today, computers (are used) in both cities and towns.` - 正确答案：`are used` - 6. `Mike (used to be) a history teacher in our school.` - 正确答案：`used to be` - 7. `There (used to be) an old temple near the town.` - 正确答案：`used to be` - 8. `Lucy (is/gets used to walking) after supper.` - 正确答案：`is/gets used to walking` - 9. `Wood (is used to make) paper.` - 正确答案：`is used to make` - 10. `Mrs. Green (has got/has been used to) eating with chopsticks.` - 正确答案：`has got/has been used to` 6. **句型转换**： - 11. `My brother used to play football after school. (改为一般疑问句)` - 改为：`Did your brother use to play football after school?` - 12. `Bell used to be a quiet boy. (改为否定句)` - 改为：`Bell didn't use to be a quiet boy.` - 13. `There used to be an old hospital behind our school.` - 保持不变，因为 `There used to be` 结构本身就是陈述过去的事实。 这个九年级英语上Unit的语法重点在于讲解了`used to do sth.`的用法，包括它的肯定句、否定句、疑问句和反意疑问句形式，并通过例句和练习题来帮助学生理解和掌握这一语法点。同时，还提到了与之相关的`be/get/become used to doing sth.`和`sth. be used to do sth.`两个短语的用法。