Unit 8 Our Blue Planet“探索”板块 Grammar in use 语法课件 2025-2026学年仁爱科普版英语七年级下册

UNit 8 Our Blue Planet Grammar in use Exploring Numbers & Imperative sentences Learning Objectives 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； 3.通过描述节水活动，体会节水的重要性。 Part 1 Grammar in Use Numbers 数词 Look at the pictures and guess its name according to the descriptions. Presentation 02 Activity 1 Look and guess. Guessing Game What’s it? It’s ...? the Qinghai Lake How large is it? It covers about 4,600 square kilometers(平方公里). We use a comma every 3 digits from the right when the number is greater than 999. 读作: four thousand, six hundred 英文数字的读法： 从右到左，三位一节，节与节之间用逗号隔开， 逗号从右到左分别读作：thousand, million, billion。 Activity 1 Look at the pictures and read the sentences. Pay attention to the numbers. The Qinghai Lake covers about 4,600 square kilometers. The coastline of the Arctic Ocean is about 45,390 kilometers long. The Changjiang River is about 6,300 kilometers long. The Atlantic Ocean covers more than 93,000,000 square kilometers. four thousand, six hundred forty-five thousand, three hundred and ninety six thousand, three hundred ninety-three million =over 超过 平方公里 Read 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 Activity 2 1.当hundred,thousand, million, billion前有具体数字时， 用单数形式，且不与of 连用。 如：three hundred five million seven billion 2.当hundred,thousand, million, billion 与of连用时，要用复数， 且前面不能有具体数字。 如：hundreds of thousands of millions of 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. Complete the sentences with the numbers in the brackets. fourteen million, two hundred thousand eleven thousand, three hundred and fifty three hundred and sixty million three hundred and seven million 南极洲 马尔马拉海 Activity 3 “百分数+of+名词” 作主语时，谓语动词的形式由of后的名词的单复数决定。 About 20 percent of my friends______from Canada.(come) 10% of the land ______ home to wild animals.(be) come is Presentation 02 Play a game. Read and say the numbers. 234 1,234 43,251 143,251 6,143,251 46,143,251 846,143,251 2,846,143,251 Part 2 Grammar in Use Imperative Sentences 祈使句 Look and guess. Look at the picture. Guess what they are talking about. What’s this? What does it say on the picture? It’s a poster about saving the ocean. 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 the table? Pair work. Read the conversation. Pay attention to the imperative sentences. Activity 1 (Xiao Ya is knocking on the door.) knock on the door= knock at the door 敲门 Complete the table and learn how to use imperative sentences. 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 talk Activity 2 keep sb./sth. doing sth. 让某人/某物一直做某事 14 Let’s learn! 肯定祈使句 (1) _______________________ (2) _______________________ (3)________________________ Positive _______ every drop of water. _______ enough water. Save water, save our planet! _______ your step! The floor is wet. Let’s ______ a poster about saving water. Save Drink Mind make Do型:动词原形开头 Be型:Be十形容词 Let型:Let+宾语+动词原形 Be quiet. Let’s learn! Negative Don’t _______ waste into the lakes. _______ waste water. No ___________ in that lake. Never _______ the water running. Let’s not _______ here! throw Don’t swimming keep speak 否定祈使句 (1) ____________________________ (2) ____________________________ Do型和Be型:句首加Don’t或never No型: “No + 名词 / 动名词” (3) ____________________________ Let型:Let十宾语十not十动原 1.以_________开头的句子叫祈使句。(主语you通常被省略) 2.祈使句常用来表示_________________________________。 3. 可在句首或句末加上_______表示礼貌, 句末用句号或感叹号。 4. 否定祈使句： 祈使句 (Imperative Sentences) please 动词原形 命令、请求、邀请、建议、祝愿或禁止等 ① __________+ 动词原形+其他. ② No + __________+其他. ③ Let’s +__________+动词原形+其他. Don’t/Never doing not 17 Match the pictures with the words or phrases, and then make imperative sentences. litter take a shower swim turn off collect fish Activity 3 Practice 1.Turn off the tap. 2. No littering. 3.Let’s take a shower. 4.Don’t swim in the river. 5.Collect the rainwater. 6.No fishing. We learn: rules of reading and writing the numbers. to use the imperative sentences. We can: build up the awareness of saving water. Summary ( )1.There are __________ of students in our school. And six ________ are girls. A.hundreds;hundreds B.hundred;hundreds C.hundreds;hundred D.hundred;hundred ( )2.—How do you read the number“3,040”in English? —Three_____and forty. A.billion B.million C.thousand D. hundred ( )3._________in the river, it's dangerous. A.Don't swim B.Not swim C.Not swimming D.No swimming ( )4.More than 67 percent of the land here __________ forests. A.is B.are C. be D.to be ( )5.—Turn off the tap.Never keep the water____. —OK. A.runs B.running C. run D.to run Exercise Self-assessment Marks I can correctly read and write large numbers and master the comma - separation rule. 1 2 3 4 5 I can understand and use the affirmative and negative forms of imperative sentences to give environmental protection instructions. 1 2 3 4 5 I can describe geographical phenomena through actual data to enhance scientific literacy. 1 2 3 4 5 Assessment 01 抄写本课生词表，一个五遍； 02 复习四位数以上的读法； 03 通过书籍或网络搜索更多祈使句的表达。 Homework Thank you ! 23 $