八年级上册 Unit 8 语法复习笔记祈使句与名词的可数性专题解析✏️📚

祈使句 (Imperative Sentences)

祈使句用于表达命令、请求、劝告、警告、禁止等，通常省略主语(you)，句首动词用原形。

肯定形式

Do型: 动词原形(+宾语)

例句

Put the book on the desk. 把书放在桌子上

Be型: Be + 形容词

例句

Be careful! 小心!

Let型: Let + sb. + 动词原形

例句

Let's make some apple juice. 弄些苹果汁吧

Let me read the letter for you. 让我给你读这封信吧

否定形式

Don't + 动词原形

例句

Don't go out at night. 晚上不要出去

Don't turn on the TV. 别打开电视

Don't + be + 形容词

例句

Don't be shy. 别害羞

Let型否定: Don't let... 或 Let...not

例句

Don't let the boy go near the river. = Let the boy not go near the river.

No型祈使句: 用于公共场合的禁止性提示

例句

No smoking! 禁止吸烟

No photos. 禁止拍照

注意事项:

可加please表示礼貌，句尾please前加逗号: Sit down, please!

可加称呼语明确对象: Cindy, be here at 8 o'clock.

可加do强调语气: Do tell me when he comes back!

可数名词与不可数名词

对比项可数名词不可数名词

定义可计算的人或物不能以数目计算的概念或物质

形式有单复数变化 (book/books)只有单数形式 (water)

冠词可用a/an (a book)不可用a/an (× a water)

数量表达可直接用数词 (two books)需用量词 (two glasses of water)

修饰词many, few, a fewmuch, little, a little

共同修饰词some, any, a lot of, lots of

不可数名词的量词表达

常见表达

a piece of bread 一片面包

two cups of tea 两杯茶

three bags of salt 三袋盐

特殊注意:

有些名词在不同语境下可数性不同: glass (玻璃/玻璃杯)

集体名词形式特殊: people (复数概念), family (单复数取决于语境)

提问方式不同:

可数: How many apples do you have?

不可数: How much water is there?

量词: How many cups of coffee do you want?

序列副词 (Sequencing Adverbs)

用于描述制作过程或事件发展顺序的副词:

顺序表达

First, peel the bananas. 首先，剥香蕉

Next, cut them up. 接着，切碎

Then, put them into the blender. 然后，放入搅拌机

Finally, pour the milk into it. 最后，倒入牛奶

语法练习

1. ___ up early tomorrow, or you can't catch the train.

A. Getting B. Get C. To get D. Got

2. ___ in the street. It's dangerous.

A. Not to worry about B. Don't worry about C. Not worry for D. Don't worry with

3. Hurry up! Some ___ and ___ are on sale in the supermarket.

A. tomato; egg B. tomatoes; eggs C. tomatoe

4. Spending too much ___ playing computer games is bad for your ___.

A. time; eyes B. time; eye C. times; eyes

第155篇红婵学霸笔记语法复习笔记 祈使句与名词的可数性专题

第155篇红婵学霸笔记语法复习笔记祈使句与名词的可数性专题