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Unit 8 Our Blue Planet
Grammar in Use教案
一、教学内容分析
本课时所学习语法分为两部分，包括千位数以上基数词和祈使句两个部分。千位数以上基数词部分，通过补全信息和阅读句子的活动，在语篇中感知千位数以上基数词的表达形式。然后，借助翻译训练、补全句子等活动，理解和体会千位数以上基数词的读法。最后，在特定的语境中引导学生正确使用千位数以上基数词。祈使句部分，通过对话感知祈使句的肯定句与否定句的表达形式。然后，观察、归纳祈使句的形式、意义，并完成相关表格。要求学生在语境中体会、理解祈使句用于表达命令、请求、劝告、警告、禁止等语气的表意功能。最后，开展迁移创新活动。
二、学情分析
通过以往的学习，学生已经能够表达0-999的数字，但对于较大数字如百万、十亿级别的数字，数字位数多且英文表达复杂，学生在认读和书写上可能存在困难，尤其是对英文中数字每隔三位用逗号隔开及相应的读法规则，需要建立一定的脚手架并配上练习来巩固。通过前几课的学习，学生有稍微涉及接触到一些祈使句的表达，但对于祈使句的含义、其肯定和否定形式的区分及准确运用，学生还不了解，需要配合练习详细讲解。
三、教学目标
通过本节课的学习，学生能够： 在语篇中感知千位数以上基数词的形式、意义和用法； 观察、归纳祈使句肯定句和否定句的形式、意义和用法，体会、理解祈使句的语气； 初步具有运用千位数以上基数词和祈使句的能力，运用所学语法知识，描述节水行动。
四、教学重难点
【重点】 在语篇中感知千位数以上基数词的形式、意义和用法； 观察、归纳祈使句肯定句和否定句的形式、意义和用法，体会、理解祈使句的语气。 【难点】 初步具有运用千位数以上基数词和祈使句的能力，运用所学语法知识，描述节水行动。
五、教学活动设计
环节一：话题导入，激活已知。（5 mins） 教师展示图片，让学生回答有关海洋的问题。
教学活动 活动层次 效果评价
Students look at the picture and answer the question. Students look at the pictures and fill in the blanks. 学习理解之感知与注意 观察学生的作答表现，评价其融入课堂的情况。
环节设计意图：通过真实数据激发兴趣，引入大数字的学习。
环节二：在语境中学习千位数以上基数词的用法。（12 mins） 教师引导学生在语境中，学习归纳千位数以上基数词的用法。
教学活动 活动层次 效果评价
Students read the sentences and pay attention to the numbers. Students review the numbers. Students think about how they express the numbers in English. Students read the numbers and complete the table. 学习理解之获取与梳理 应用实践之内化与运用、分析与判断 观察学生的表现,了解其是否掌握千位数以上基数词的用法。
环节设计意图: 在语境中呈现千位数以上基数词的写法，帮助学生进一步了解世界水景知识，并掌握该语法形式。通过讨论，引导学生自主发现并总结千位数以上基数词的用法。
环节三：通过练习，巩固千位数以上基数词的用法（5 mins） 学生完成相关练习，帮助学生巩固千位数以上基数词的写法和读法。
教学活动 活动层次 效果评价
Students complete the sentences with the numbers in the brackets. 应用实践之内化与运用 观察学生完成句子的情况，判断其是否能理解该语法的形式和意义并在语境中正确使用。
环节设计意图: 学生通过完成句子的练习活动，巩固千位数以上基数词的写法和读法，在语境中准确表达该类基数词。
环节四：在语境中学习祈使句的用法。（13 mins） 教师引导学生在语境中梳理总结祈使句的语法规则。
教学活动 活动层次 效果评价
Students observe the picture and guess what they are talking about. Students read the conversation and pay attention to the sentences in bold. Students read the sentences and complete the table. Students observe the sentences and fill in the chart. 学习理解之感知与注意，获取与梳理 观察学生的活动表现，了解其对祈使句的内化情况，及时给予鼓励和指导。
环节设计意图: 通过朗读、观察、讨论、分析，引起学生的兴趣，激活学生的思维。通过表格理解和运用祈使句肯定句和否定句，帮助学生正确使用祈使句来表达意义。
环节五：通过练习，巩固祈使句的用法。（10 mins） 教师引导学生完成相应的练习，并通过造句的形式巩固祈使句的用法。
教学活动 活动层次 效果评价
Students match the pictures with the words or phrases. 13. Students make imperative sentences based on the pictures and expressions. 14. Students work in groups to talk about how to save water by using imperative sentences. Then they write them down. 应用实践之内化与运用 迁移创新之想象与创造 观察学生学习活动的表现，评价学生综合运用所学语法知识的情况。
环节设计意图: 在真实语境中，引导学生正确使用祈使句谈论节水措施，帮助学生准确、恰当、得体地使用祈使句肯定句与否定句的语言形式，引导学生发展英语语法意识和能力。
作业与拓展 Read the number in Activity 2 on page 28. Make a poster. Write at least 5 imperative sentences about protecting the environment in English.
4 / 4(共22张PPT)
Our Blue Planet
Unit 8
Grammar in Use
英语仁爱版七年级下册
重点
重点
通过本课时学习，学生能够：
1. 在语篇中感知千位数以上基数词的形式、意义和用法；
2. 观察、归纳祈使句肯定句和否定句的形式、意义和用法，
体会、理解祈使句的语气；
3. 初步具有运用千位数以上基数词和祈使句的能力，运用
所学语法知识，描述节水行动。
Learning objectives
How many oceans are there in the world What are they
Look and answer
Look and fill
Look at the pictures and fill in the blanks.
1. The coastline of ________________
is about 45,390 kilometers long.
the Arctic Ocean
n. 海岸线；沿海地带
/ k stla n/
2. _________________ covers more than 93,000,000 square kilometers.
The Atlantic Ocean
v. 覆盖；遮盖
/ k v (r)/
3. _________________ is about 4,600 square kilometers.
The Qinghai Lake
4. ____________________ is about 6,300 kilometers.
The Changjiang River
Read and learn
Read the following sentences and pay attention to the numbers.
The Qinghai Lake
covers about 4,600 square kilometers.
The Changjiang River is about 6,300 kilometers.
The coastline of the Arctic Ocean is about 45,390 kilometers long.
The Atlantic Ocean covers more than 93,000,000 square kilometers.
We use a comma every 3 digits from the right when the number
is greater than 999.
Let’s review
Review the following numbers.
100
101
185
315
999
nine hundred and ninety-nine
one hundred
one hundred and one
one hundred and eighty-five
three hundred and fifteen
一千 1,000
一百万 1,000,000
十亿 1,000,000,000
one thousand
one million
one billion
拓展
Think and say
1. The Qinghai Lake covers about 4,600 square kilometers.
2. The Changjiang River is about 6,300 kilometers.
3. The coastline of the Arctic Ocean is about 45,390 kilometers long.
4. The Atlantic Ocean covers more than 93,000,000 square kilometers.
four thousand and six hundred
six thousand and three hundred
forty-five thousand, three hundred and ninety
ninety-three million
How can we express the following numbers in English
Read the numbers and complete the table.
4,186 four thousand, one hundred and eighty-six
45,390 forty-five _________, three __________ and ninety
6,363,000 six million, three hundred and sixty-three thousand
1,386,000,000 one billion, three hundred and eighty-six ________
909,090,009,900 nine hundred and nine ________, ninety _________, nine __________, nine hundred
thousand
hundred
million
billion
million
thousand
Read and complete
第一个逗号“,”前为thousand
第二个逗号“,”前为million
第三个逗号“,”前为billion
Antarctica is about ____________________________________ (14,200,000) square kilometers in size, and ice covers about 98 percent of the land.
The Sea of Marmara is about __________________________________ (11,350) square kilometers.
Oceans cover about ___________________________ (360,000,000) square kilometers of the earth.
There are about ____________________________ (307,000,000) lakes in
the world.
fourteen million and two hundred thousand
eleven thousand, three hundred and fifty
three hundred and sixty million
three hundred and seven million
Complete the sentences with the numbers in the brackets.
Read and complete
Observe the picture and guess what they are talking about.
Observe and guess
(Xiao Ya is knocking on the door.)
Come in, please
Oh, don’t put it here. Please put it on that big chair.
Miss Wang, here is the poster about saving the ocean. Can I put it on this table
Read the conversation and pay attention to the sentences in bold.
Read and answer
What kind of sentences are they
Imperative sentences.
Read the sentences and complete the table.
Positive Negative
_______ every drop of water. Don’t _______ waste into the lakes.
_______ enough water. _______ waste water.
Save water, save our planet! No ___________ in that lake.
_______ your step! The floor is wet. Never _______ the water running.
Let’s ______ a poster about saving water. Let’s not _______ here!
Save
Drink
Mind
make
throw
Don’t
swimming
keep
speak
Read and complete
Imperative sentences are often used to express the speaker’s advice, instructions, requests, or commands.
Positive Negative
Save every drop of water. Don’t throw waste into the lakes.
Drink enough water. Don’t waste water.
Save water, save our planet! No swimming in that lake.
Mind your step! The floor is wet. Never keep the water running.
Let’s make a poster about saving water. Let’s not speak here!
Observe and fill
肯定形式 否定形式
Do 形 1. __________ +宾语+其他. 2. ____________ +动词原形+宾语
+其他.
动词原形
Don’t/Never
Positive Negative
Save every drop of water. Don’t throw waste into the lakes.
Drink enough water. Don’t waste water.
Save water, save our planet! No swimming in that lake.
Mind your step! The floor is wet. Never keep the water running.
Let’s make a poster about saving water. Let’s not speak here!
Observe and fill
肯定形式 否定形式
Let 形 3. _____ +宾语+动词原形 +其他. 4. Let+宾语+ _____ +动词原形+其他.
5. Don’t+let+宾语+动词原形+其他.
Let
not
Positive Negative
Save every drop of water. Don’t throw waste into the lakes.
Drink enough water. Don’t waste water.
Save water, save our planet! No swimming in that lake.
Mind your step! The floor is wet. Never keep the water running.
Let’s make a poster about saving water. Let’s not speak here!
Observe and fill
肯定形式 否定形式
No 形 6. No + _____________.
(表示禁止，常用于公共场合的标语)
名词/动名词
litter
take a shower
swim
turn off
collect
fish
Match the pictures with the words or phrases.
Look and match
Make sentences
Make imperative sentences based on the pictures and expressions.
1. Turn off the tap while brushing teeth.
2. Don’t litter around.
3. Take a quick shower.
4. No swimming. / Don’t swim in the river.
5. Collect rainwater.
6. No fishing. / Don’t fish here.
litter
take a shower
swim
turn off
collect
fish
Work in groups to talk about how to save water by using imperative sentences. Then write them down.
Talk and write
1. ___________________________________________
2. ___________________________________________
3. ___________________________________________
4. ___________________________________________
Summary
build up the awareness of saving water.
know the rules of reading and writing the numbers and use the imperative sentences.
2
1
After learning this lesson, I can
1. A: Let's go and see the monkeys. They' re my favourite animals. B: Why do you like them
A: Because they' re clever and funny.
2. A: Oh, look! A baby wolf and its mother! Do you like wolves B: No, I don't. They' re very dang
Homework
1. Read the number in Activity 2 on page 28.
2. Make a poster. Write at least 5 imperative sentences about protecting the environment in English.
Bye-bye!

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