Unit 6 Trees （Grammar in use）课件2025-2026学年沪教版（五四学制)七年级英语下册

这是一份初中英语沪教版五四制七年级下册Unit 6 Trees的同步教学课件，共25页。以数词学习为核心，通过游戏导入、亚马逊雨林数字复习搭建学习支架，系统讲解基数词、序数词、小数、分数和百分数的读写规则，结合表格归纳、情境任务（如描述悬铃木特征）及练习巩固，助力学生掌握数词运用。 资料特色显著，注重核心素养培育。通过“Seven Game”等互动游戏激发学习兴趣，结合亚马逊雨林真实数据引导学生在情境中理解数词功能，任务驱动（如小组讨论植物特征、撰写含多种数词的植物报告）提升语言运用与思维品质，渗透环保教育增强社会责任感。符合七年级学生认知特点，为教师提供结构化教学方案，助力高效开展数词教学，帮助学生夯实语法基础并树立保护植物意识。

Trees 第四课时 Unit 6 Grammar in use 英语沪教版五四制七年级下册 Learning objectives 通过本课时学习，学生能够： 1. 准确认读、拼写基数词、序数词、小数、分数和百分数； 2. 熟练掌握不同类型数词的表达规则，并能正确运用这些规则； 3. 运用不同数词描述植物特征，感受数词在准确表达信息方面的作用， 树立保护植物的责任感。 重点 重点 Play a game Work in groups and play the Seven Game. Rules: 1. Players take turns to count, starting from 1. 2. When a number contains the digit 7 (e.g., 7, 17, 27) or is a multiple of 7 (e.g., 14, 28), the player must skip (跳过) that number and say the next one. 3. If a player says a number that shouldn’t be said, he/she loses the game. Let’s review Can you remember the amazing numbers about the Amazon Rainforest? About the Amazon Rainforest 1 About of the rainforest is in Brazil. 2 It covers about _______ million square kilometres. 3 People can find nearly _______ kinds of plants and about ________ kinds of freshwater fish here. 4 It contains ________ of the world’s liquid fresh water. 60% 6.7 50,000 2,400 8 Read and spell 1. About 60% of the rainforest is in Brazil. 2. It covers about 6.7 million square kilometres. 3. People can find nearly 50,000 kinds of plants and about 2, 400 kinds of freshwater fish here. 4. It contains of the world’s liquid fresh water. Can you spell out these numbers in full? sixty per cent six point seven fifty thousand two thousand and four hundred one fifth 8 Let’s enjoy Do you know any other amazing numbers about the Amazon Rainforest? Think and share The Amazon is the second largest forest in the world after the taiga (boreal forest). The Amazon Rainforest is home to about ten per cent of the known species on Earth. An area of one thousand and three hundred football fields of the Amazon is destroyed every day. More than a half of the Amazon’s tree species are still undiscovered by science. Read and answer 1. About sixty per cent of the rainforest is in Brazil. 2. It covers about six point seven million square kilometres. 3. People can find nearly fifty thousand kinds of plants and about two thousand and four hundred kinds of freshwater fish here. 4. It contains one fifth of the world’s liquid fresh water. 5. The Amazon is the second largest forest in the world after the taiga (boreal forest). What are these numbers? Percentage Decimal Cardinal numbers Fraction Ordinal numbers Numerals Can you find anything in common among these numbers? 0 zero 10 ten 1 one 11 eleven 2 two 12 twelve 3 three 13 thirteen 4 four 14 fourteen 5 five 15 fifteen 6 six 16 sixteen 7 seven 17 seventeen 8 eight 18 eighteen 9 nine 19 nineteen 20 twenty 21 twenty-one 30 thirty 22 twenty-two 40 fourty 23 twenty-three 50 fifty 24 twenty-four 60 sixty 25 twenty-five 70 seventy 26 twenty-six 80 eighty 27 twenty-seven 90 ninety 28 twenty-eight 100 hundred 29 twenty-nine 注意 13~19均以-teen结尾 注意 20以上整十数均以-ty结尾； 20以上非整十数，十位和 个位之间加连字符。 Cardinal numbers Observe and summarize 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 Can you find anything in common among these numbers? We use __________ between the hundreds and tens. We use __________ between the hundreds and tens. “Hundred” stays __________ when used with plural numbers. “and” singular a comma three We often use __________ or a space to separate big numbers into groups of _____ from right to left. Read and complete 4,189 four thousand, one hundred and eighty-nine 15,362 fifteen _________, three __________ and sixty-two 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 the numbers and complete the table. 第一个逗号“,”前为thousand 第二个逗号“,”前为million 第三个逗号“,”前为billion Read and complete Ordinal numbers 1st = ________ 6th = ________ 12th = twelfth 22nd = ____________ 2nd = second 7th = ________ 14th = _________ 30th = ____________ 3rd = third 8th = ________ 19th = _________ 40th = fortieth 4th = fourth 9th = ninth 20th = twentieth 90th = ____________ 5th = fifth 10th = ________ 21st = twenty-first 100th = ___________ Look and write Read and complete the table. sixth seventh eighth tenth fourteenth nineteenth twenty-second thirtieth ninetieth one hundredth first 1st = ________ 6th = ________ 12th = twelfth 22nd = ____________ 2nd = second 7th = ________ 14th = _________ 30th = ____________ 3rd = third 8th = ________ 19th = _________ 40th = fortieth 4th = fourth 9th = ninth 20th = twentieth 90th = ____________ 5th = fifth 10th = ________ 21st = twenty-first 100th = ___________ Look and write Can you find anything in common among these ordinal numbers? sixth seventh eighth tenth fourteenth nineteenth twenty-second thirtieth ninetieth one hundredth first For most cardinal numbers: add -th to the end. But 1, 2 and 3 are different. For cardinal numbers ending with -y: change -y into -ie and then add -th. For cardinal numbers ending with -ve: change -ve into -f and then add -th. For 2-digit numbers (21, 22, 23, 24, ...): change the last digit into its ordinal form. 17 12 4 2 101 6 20 93 55 5 87 18 41 9 13 69 开始/暂停 Play a game Read out the cardinal number the pointer lands on. Then say and spell out its ordinal number. Read and fill Decimal There is a magical tree in the forest. Last year it was nine point seven eight meters tall, but now it is _________________ meters tall, and it has grown by ________________ meters. There was a little squirrel playing in the big tree every day. It found that... 10.03 m ten point zero three zero point two five How can we read or write decimals in full? cardinal number point each number + + 1. The decimal point “.” is read as _________. 2. “0” is read as _________. point zero Continue the story Decimal There is a magical tree in the forest. Last year it was nine point seven eight meters tall, but now it is ten point zero three meters tall, and it has grown by zero point two five meters. There was a little squirrel playing in the big tree every day. It found that... Can you continue the story with more decimals? Share your story with the class. Observe and summarize Fraction Can you find anything in common among these numbers? 2 one third one fifth one half or a half a (one) quarter or a (one) fourth two thirds three fifths two and one half or a half three and three quarters or three fourths The numerator (分子) is ___________ number and the denominator (分母) is ___________ number. If the numerator is more than 1, you use the ___________ form of the denominator. For mixed fractions, you can say “the cardinal number + ____________ + fraction”. You can read as __________________ and as __________________________________. cardinal ordinal plural and one half or a half a (one) quarter or a (one) fourth 3 Read and fill Percentage Can you change these fractions into percentages? 50% / fifty per cent 25% / twenty five per cent __________________________________ a quarter a half __________________________________ “%” is often read or written as ____________. per cent Read the percentages in full: 15% ______________ 60% ______________ 34.7% __________________________ 206.48% ________________________________________ fifteen per cent sixty per cent thirty-four point seven per cent two hundered and six point forty-eight per cent Read and write Read the following sentences and write down the numbers in Arabic forms. (1) The Amazon Rainforest covers about six point seven million square kilometres. (2) Forests cover about thirty-one per cent of the Earth’s land area. (3) There are over one hundred lakes in the Jiuzhaigou Valley. (4) The Amazon Rainforest contains one fifth of the world’s liquid fresh water. 6.7 31% 100 Work out the rules Tick (√ ) the one(s) that you agree with. In the above context, we use numbers to ... show a specific amount. take a measurement. make something easier to understand. Read and complete Complete each of the sentences with one number in the box. Spell out the numbers in full. 4,800 116.07 17% (1) More than _____________________ of all people outside cities live within 1 kilometre of a forest. (2) Currently, the tallest tree is a coast redwood. It reached __________________________ __________ metres in 2019. (3) The oldest tree is a bristlecone pine. It is over __________________________ years old. (4) About _________________ of the Amazon Rainforest was destroyed by human activities in the last half century. three fourths/quarters one hundred and sixteen point zero seven four thousand eight hundred seventeen per cent Look and talk Work in pairs and talk about the plane tree according to the information below. Height: up to 40 metres Leaf length: 10-24 centimetres Trunk width: up to around 1.3 metres e.g. The plane tree can grow up to 40 metres tall. Give a report The plane tree is a remarkable tree. Its leaves are quite large, with a length ranging from 10 to 24 centimetres. It has an impressive height. Some can grow up to 40 metres. When it comes to the trunk, it can be up to around 1.3 metres in width. This makes the plane tree a very big and eye-catching tree in the areas we live in. Let’s enjoy Summary develop a stronger sense of responsibility for plant protection. 2 1 After learning this lesson, I can 3 use numbers to describe the features of plants like the plane tree. write and read numbers in different forms correctly. Cardinal numbers Ordinal numbers Decimals Fractions Percentages Homework 1. Write down your report. 2. Write a short passage about another tree or plant, using five different types of numerals to describe it. Bye-bye! $