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课件网) Unit 8 Our Blue Planet Lesson 5 Grammar in Use Learning Objectives In this class, you will 理解数字的结构、含义和使用方法以及祈使句的用法 使用本单元所学语法知识获取不同水域的特点并描述如何 节约用水 树立节约用水的意识 Lead-in Activity 1 Look at the pictures and guess its name according to the descriptions. The _____ is about 4,600 square kilometers. The _____ is about 6,300 kilometers. Qinghai Lake Changjiang River Activity 1 Look at the pictures and read the sentences. Pay attention to the numbers. The Qinghai Lake covers about 4,600 square kilometers. Observing 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. Summarizing Activity 2 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 Applying Activity 3 Complete the sentences with the numbers in the brackets. fourteen million and two hundred thousand eleven thousand, three hundred and fifty three hundred and sixty million three hundred and seven million 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. Observing Look at the picture. Guess what they are talking about. (Xiao Ya is knocking on the door.) Miss Wang: ... Xiao Ya: … Miss Wang: … Observing Activity 1 Pair work. Read the conversation. Pay attention to the imperative sentences. (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 the table Summarizing Activity 2 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 speak Applying Activity 3 Match the pictures with the words or phrases, and then make imperative sentences. litter take a shower swim turn off collect fish Applying Activity 3 Match the pictures with the words or phrases, and then make imperative sentences. litter take a shower swim turn off collect f ... ...
