Unit 6 Grammar in use课件-2025-2026学年沪教版(五四制)英语七年级下册

英 语 七年级下册 多媒体教学课件 ENGLISH 7B Unit 6 Grammar in use Numerals Trees Q How much do you know about numerals? 2 Think and tick 1 Do a quiz about trees. 1. Forests cover about ________ of the Earth’s land area. a. thirty-one per cent b. thirty-five per cent 2. The Amazon Rainforest covers about ________ million square kilometres. a. six point seven b. seven point six 3. The Amazon Rainforest contains ________ of the world’s liquid fresh water. a. one fifth b. one sixth 4. There are over ________ lakes in the Jiuzhaigou Valley. a. ninety b. one hundred Read and think 2 Read the 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 Tick (√) the one(s) that you agree with. Work out the rules 3 3 In the above context, we use numbers to show ... ▢ time or dates. ▢ a specific amount. ▢ the order of events. √ Learn to say the numbers. Work out the rules 3 3 10 11 12 13 14 15 16 17 18 19 20 30 40 50 60 70 80 90 When we say fourteen, we stress the second syllable. When we say forty, we stress the first syllable. ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty thirty forty fifty sixty seventy eighty ninety Cardinal numbers Learn to say the numbers. Work out the rules 3 3 Cardinal numbers 28 32 44 59 63 75 89 91 When we write a two-word number, we add a “-”. twenty-eight thirty-two forty-four fifty-nine sixty-three seventy-five eighty-nine ninety-one Learn to say the numbers. Work out the rules 3 3 Cardinal numbers 100 200 1,000 10,000 200,000 1,000,000 20,000,000 300,000,000 one hundred two hundred one thousand ten thousand two hundred thousand one million twenty million three hundred million thousand million Among the cardinal numbers, hundred, thousand and million have no “s”. Learn about the rules. Notes: We use cardinal numbers to count and say how many of something there are. 我们用基数词来计数和表示事物的确切数量。 e.g. There are seven days in a week. There are over one hundred lakes in the Jiuzhaigou Valley. Work out the rules 3 3 Cardinal numbers Learn to say the numbers. Work out the rules 3 3 Ordinal numbers 5 9 12 100 20 30 40 90 21 33 45 69 ty + tieth 1 2 3 4 first second third fourth fifth ninth twelfth one hundredth twentieth thirtieth fortieth ninetieth twenty-first thirty-third forty-fifth sixty-ninth Notes: Most ordinal numbers are made by adding “-th” to the cardinal numbers, except for one, two and three. Learn about the rules. Notes: We use ordinal numbers to show the position of something in an order list. 我们用序数词来表示事物在有序列表中的顺序。 e.g. Carl won second prize in the speech competition. Work out the rules 3 3 Ordinal numbers Learn to say the numbers. Work out the rules 3 3 Decimals point zero six fifty-nine two three Notes: We say each number separately after a decimal point. 小数点后的每个数字应分别念出。 Learn to say the numbers. Work out the rules 3 3 Fractions Notes: 1. Fractions are expressed by using cardinal numbers and ordinal numbers together. 分数用基数词和序数词共同来表示。 2. If a numerator is over 1, we need to add “s” after the denominator. 如果分子大于1，我们需要在分母的表达后加s。 one two third third s numerator denominator Ordinal numbers Cardinal numbers Learn to say the numbers. Work out the rules 3 3 Fractions two one fifth and mixed fraction special fractions a half a/one quarter three quarters (1) More than _________________ of all people outside cities live within 1 kilometre of a forest. (2) Currently (现时；目前), the tallest tree is a coast redwood (海岸红杉). It reached ______________________________ metres in 2019. (3) The oldest tree is a bristlecone pine (刺果松；长寿松). It is over ______________________ years old. (4) About _______________ of the Amazon Rainforest was destroyed by human activities in the last half century. Practise 4 Complete each of the sentences with one number in the box. Spell out the numbers in full. three fourths/quarters 4,800 116.07 17% one hundred and sixteen point zero/oh seven four thousand eight hundred seventeen per cent An introduction 5 Introduce the plane tree (悬铃木) to your deskmate according to the information below. e.g. The plane tree can grow up to 40 metres tall. (Answers may vary.) (1) The leaves of the plane tree are/measure ten to twenty-four centimetres in length. (2) The trunk of the plane tree can reach a width of about one point three metres. 语法精讲——数词 1.数词 1.1.基数词和序数词 基数词表示数量，序数词表示顺序。序数词由基数词变化而成，具体构成如下： 构成 例句 第一、第二、第三需特殊记忆。 first 第一 second 第二 third 第三 4-19的序数词是由其相对应的基数词后面加－th构成。 eleven→eleventh 第十一 thirteen→thirteenth 第十三 有4个词拼写不规则：fifth,eighth,ninth,twelfth. 整十的序数词由其对应的基数词变词尾字母y为ie,再加－th构成。（注意：ten的序数词为tenth.) twenty→twentieth 第二十 fifty→fiftieth第五十   表示“第几十几”时，只将个位数变为序数词，十位数仍用基数词。 thirty-one→thirty-first 第三十一 fifty-six→fifty-sixth 第五十六 1.2.数词的用法 内容 用法 例子 分数表示法   分子用基数词，分母用序数词。分子大于1时，作分母的序数词需用复数形式。单词之间可有连字符，也可以没有。如果是带分数，用and连接整数和分数即可。 1/3:one-third   年龄表示法 用“in+one's+整十的基数词的复数形式”表示“在某人几十多岁时”。表示一个人具体的岁数时，可用“at the age of+基数词”表示。 My grandmother is now in her eighties.我奶奶现在80多岁了。   编号表示法 ①用基数词编号时，用“名词＋基数词”表示。 ②用序数词编号时，用“the+序数词＋名词”表示。 502房间：Room 502 第七页：the seventh page 1.3.确切数目和大约数目的表示法 类别 表达法 例子 确切数目 当 hundred,thousand,million等前面有具体数字或有many,several,few等修饰时，用其单数形式，不与of连用。此时表达确切数目。 I make nine hundred dollars a week.我一周挣900美元。 约略数目 当 hundred,thousand,million等与of连用时，要用其复数形式，其前不能加其他表示数量的词语。此时表达大约的数字概念。 There are thousands of things I want to do.我有很多事情想做。 Complete the exercises on page 80, Workbook 7B. HOMEWORK 21 $