内容正文:
Unit2 Transportation
语法之祈使句
肯定祈使句
否定祈使句
知识清单
Scenario
Grammar
Practice
情景导入
Scenario
Be careful with the wet floor.
小心地滑
Wash your hands properly.
正确洗手
Have a rest.
休息一下
Don’t be late.
不要迟到
Don’t play computer games.
不要玩电脑游戏
No photos.
禁止拍照
No smoking.
禁止吸烟
No swimming.
禁止游泳
探索发现
1.Be careful with the wet floor.
2.Wash your hands properly.
3.Have a rest.
4.Don’t be late.
5.Don’t play computer games.
6.No photos.
7.No smoking.
8.No swimming.
归纳总结
1.左边8个句子均为 句,表达 、 、 、
、 等意义。
2.祈使句的肯定句常以 开头;否定句常以 + 或
+ 构成。
祈使
命令
请求
劝告
警告
禁止
动词原形
Don’t
动词原形
No
名词或V-ing
牛刀小试
判断下面句子是否祈使句(T or F)
Turn off the lights beforeleaving, please.
Working hard is the key to success.
Turn left and you will see the library.
She is worried about her child.
Let’s go!
6. No entry.
7. Linda speaks Chinese well.
8. Don’t be nervous.
T
F
T
F
T
T
F
T
答案:D
解析:考查虚拟语气。句意:如果他们多开几公里的话,他们也许会找到一个更好的旅馆。由“they might have found a better hotel”可知,该句是表示对过去的虚拟。if ____ a few more kilometers是条件句部分,表示对过去的虚拟,条件句部分要用过去完成时态,故D选项正确。
More
________ (help) yourself with some fish!
2. ______ (be)quiet in the library!
3. _______ (be) careful with the fire.
4. (not make) noise.
5. No (talk).
牛刀小试
Help
Be
Be
Don’t make
talking
一、祈使句的肯定形式
1. 动词原形开头,如:
Stand up!
Please open the door.
Sit down, please. (please位于句首或句末,表示礼貌)
Be careful!
Be quiet!
Let’s go! (Let+sb+do)
注意:祈使句以动词原形开头,其隐藏的主语通常为
you(你,你们)
总结
二、祈使句的否定形式
1. Don’t+V原,如:
Don’t listen to him!
Don’t open the door.
Don’t be nervous.
Don’t be late.
2.No+名词/V-ing,如:
No photos.
No smoking.
No littering.
总结
三、祈使句的回答
1. 肯定回答:
---Bring your homework here tomorrow!
---Ok/Yes, I will.
2. 否定回答:
---Don’t make any noise!(不要制造噪音)
---Sorrry,I won’t.
总结
祈使句前面可以加一个称呼,引起听话对象的注意,如:
Ella,stand up!
Lisa, don’t open the door!
(人物称呼跟动词之间有逗号隔开)
注意对比下列两个句子:
John, run fast!
John runs fast.
易混点辨析
Scenario
Grammar
Practice
练习检测
Practice
1.________ run so quickly