課程內容
四年級英語上冊Unit 5《Safety》Lesson 2
Look,listen and repeat.
Be careful!Use the sidewalk.
OK!
Please wait for the green light.It's safe.
OK!Thank you.
sidewalk人行道
Please walk on the sidewalk.
請走人行道。
巧記：
side旁邊+walk走=sidewalk人行道
wait for等待
Please wait for me at the bus stop.
請在公交車站等我。
拓展：wait等待
light燈
The lights in this street are very beautiful.
這條街道上的燈非常漂亮。
復數：lights
形近詞：right對的
night夜晚
eight八
派生詞：lighter打火機
轉化：light點燃，點著
合成詞：flashlight手電筒
safe安全的
Please wait for the green light.
It's safe.
請等待綠燈。它是安全的。
形近詞：save挽救
派生詞：safety安全
反義詞：dangerous危險的
合成詞：safeguard保護；捍衛
OK!Thank you.
好的！謝謝你。
Father:Be careful!Use the sidewalk.
Daughter:OK!
Policeman:Please wait for the green light.
It's safe.
Man:OK!Thank you.
祈使句的特點及類型
課文應用：
Be careful!Use the sidewalk.
當心！使用人行道。
祈使句是用來表達命令、請求、勸告、
警告、禁止等的句子。
祈使句的特點：
（1）祈使句通常省略主語（you），但是要想指明服從這項命
令的人，可以在祈使句的前面或后面加上姓名或稱呼。
（2）祈使句里使用的動詞一般用動詞原形。
（3）祈使句主要用于要求對方（第二人稱）做某事，當對第一人稱
或第三人稱有所命令時，要用Let型祈使句。
例如：Let him clean the classroom.
讓他打掃教室吧。
（4）please可以用于祈使句的開頭或末尾，表示委婉語氣，在含有
don't的否定句中，please用在don't的前面或句末。
例如：Please sit down.請坐。
Please don't jump in the room=Don't jump in the room，please.
請不要再房間里跳。
祈使句的用法
祈使句主語常省去，只用謂語就可以。
表示請求或命令，加上please表客氣。
如果變成否定句，加上don't是規律。
Look，think and role-play
Be careful!Please wait for the green light.
It's safe.
當心！請等綠燈。它是安全的。
OK!Thank you.
好的！謝謝你。
Don't read in the street.
不要在街上讀書。
It's dangerous.
它是危險的。
OK!Thank you.
好的！謝謝你。
The light is green.Please go.
是綠燈了。請走吧。
OK!
好的！
Don't play football in the street.
不要在街上踢足球。
It's dangerous.
它是危險的。
Be careful!Use the sidewalk.It's safe.
OK!Thank you.
Ask and answer
Look,ask and answer.
Fire safety
In the forest
At home
What mustn't we do...?
We mustn't...
smoke
play with matches
play near fires
Look and learn
Don't start campfires.
=We_.
Don't play near fires.
=We_.
Don't play with matches.
=We_.
Match and say
In the forest
At home
At school
a Don't smoke.
b Don't play with matches.
c Don't start campfires.
d Don't play near fires.
Fire can start in/at...
We must be careful.
In/At...We mustn't...
Let's write
Be careful!Use the_.
Please wait for the_.It's safe.
此內容正在抓緊時間編輯中，請耐心等待
王老師
女，小教高級職稱
高級教師，名師，骨干教師 ，學術帶頭人，多次榮獲省市優質課一等獎。
