Unit 7 Section B (1a-1e) 课件 2023-2024学年人教版七年级英语上册

How much are these socks? Unit Seven Section B (1a-1e) 数词 1.基数词:表示数量多少的词,如 one, six... 2.序数词:表示先后顺序的词:第一 first,第二second... Numbers(0-9) four zero one two three five six seven eight nine Numbers(10-12) ten eleven twelve 规则1: 从zero到twelve, 拼写和读音没有什么规律, 逐一记忆; Numbers(13-19) 规则2: 从thirteen 到nineteen, 表示“十几”,其后均有后缀-teen。注意thirteen, fifteen, eighteen的拼写。 thirteen fourteen fifteen sixteen seventeen eighteen nineteen Numbers(20-90) 规则3: 从twenty到ninety,表示“整几十”,其后均有后缀-ty。 但需注意以下几个词的拼写:twenty, thirty, forty, fifty, eighty。 twenty thirty forty fifty sixty seventy eighty ninety Numbers(21-28) 规则4: 表示“几十几”, 用“整十数-个位数”表示,中间用连字符“-”把十位数和个位数连接起来。 twenty-one twenty-two twenty-three twenty-four twenty-five twenty-six twenty-seven twenty-eight one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty thirty forty fifty sixty seventy eighty ninety twenty-one … twenty-nine thirty-one … thirty-nine forty-one … forty-nine fifty-one … fifty-nine sixty-one … sixty-nine seventy-one … seventy-nine eighty-one … eighty-nine ninety-one … ninety-nine one hundred Learn these numbers and find out the rules Find out the rules of the numbers 1) 13~19 规律:个位数字后加 -teen 注意:thirteen, fifteen, eighteen 2)21~29及31~39等数字的规律: twenty或thirty后加连字符,再加个位数 3)20、30等表示几十的数,大部分构成形式为:个位数后加ty, 注意twenty, thirty, fifty Try it 1. twenty-six - twelve - nine = _ 2. sixteen + eight + eleven = _ 3. eighteen - seven + fifteen = _ 4. thirteen+fourteen-twenty-five = _ 5. twenty-nine-thirteen-ten = _ 6. thirty-nine - twenty - five =_ five thirty-five twenty-six two six fourteen 1,234,567,890 349位教师 995位学生 几百名教师 One billion two hundred and thirty-four million five hundred and sixty-seven thousand eight hundred and ninety three hundred and forty-nine teachers nine hundred and ninety-five students hundreds of teachers Read and guess what is the relationship(关系) between them. Listen and write down the items(物品) they are talking about. blue sweater socks T-shirt g