人教版 一年级起点 四年级上
Unit 4 Asking for help
Lesson 1
lead in
Who are they? Where are they?
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climb on the window ledge
[?w?nd??] [led?]
爬窗台
ow字母组合?
[a?] flower down now
[??] know low
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dangerous adj 危险的
[?de?nd??r?s]
It’s dangerous. 危险。
danger n 危险
be in danger 处于危险之中
It’s __________ to play football in the street.
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play with fire
It’s dangerous to _______.
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Be careful. 当心。
[?ke?f?l]
care n 照顾照看
take care of 照顾照看
--ful 后缀,构成形容词
colorful beautiful useful
________! It’s dangerous.
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run down the stairs
[st??]
跑下楼梯
run up the stairs 跑上楼梯
We shouldn’t ____________.
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Be careful!
Don’t ___________________.
It’s dangerous.
run down the stairs
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Be careful!
Don’t ___________________.
It’s dangerous.
swim in the river
Be careful!
Don’t ___________________.
It’s dangerous.
play with fire
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Be careful!
Don’t _________________________.
It’s dangerous.
climb on the window ledge
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祈使句
祈使句是用来表达命令、请求、劝告、警告、禁止等的句子。
特点:
1)通常省略Do型祈使句的主语,若想指明服从这项命令的人,我
们可以在祈使句的前面或后面加上姓名和称呼;
2)Do型祈使句里的位于动词一般用原型;
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3)please可以用于Do型祈使句的开头或末尾,使语气更委婉。在
Do型否定祈使句重,please位于don’t 的前面或句末;
Please sit down.
Please don’t jump in the room.= Don’t jump in the room, please.
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类型:
1)Do型祈使句。句型结构:实义动词原形(+其他)
Come in, please!
2)Be型祈使句。句型结构:Be +表语(+其他)
Be quiet, please.
3)Let 型祈使句。句型结构:Let +宾语+动词原形(+其他)
Let Bob go shopping!
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4)No 开头的祈使句。句型结构: No+动词-ing形式/ 名词.
No fishing. = Don’t fish.
No parking. = Don’t park.
No photos.
注意: No+动词-ing= Don’t +动词原形
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Practice
Be careful! Don’t ______________.
It’s dangerous.
Fill in the blanks.
Practice
Let’s write.
Be careful! Don’t .
Don’t climb on the ledge. It’s dangerous!
看图写短语
__________________ _______________________ _________________________
Consolidation
选择填空
1)__________ careful! Don’t stand on the desk.
A. Be B. Is C. Are
2)Don’t play with the knife. It’s _______.
A. fun B. interesting C. dangerous
3)Don’t sit ______ the window ledge.
A. in B. on C. at
Consolidation
A
C
B
谢谢
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