Unit 2 Numbers 课时3 语法 (课件PPT)-【宝典训练】2024-2025学年八年级上册英语高效课堂(沪教牛津版（广州深圳沈阳通用）)

Unit 2　Numbers 课时3 语法 目 录 01 课时精讲 02 课时过关 01 课时精讲 第 ‹#› 页 课时3 语法 返回目录 语法精讲 本单元重点介绍基数词、序数词和简单的数字运算。 　　基数词和序数词 1．基数词表数量，后接可数名词； 序数词表顺序，前面须加the，但当序数词前面有形容词性物主代词或所有格修饰时，不加the。 如：three days　　the third day　　Tom's third birthday 第 ‹#› 页 课时3 语法 返回目录 2．基数词变序数词的规律是在基数词后加-th，有些有特殊变化，分别是： one two three four five six seven eight nine ten first second third fourth fifth sixth seventh eighth ninth tenth twelve twenty twenty-one twenty-two twenty-three thirty forty ninety hundred twelfth twentieth twenty-first twenty-second twenty-third thirtieth fortieth ninetieth hundredth * 加粗部分为易错数字，注意写法。 (口诀：一、二、三特殊记，词尾字母t、d、d；八去t；九减e；f换ve；遇到整十数词，y变ie；遇到几十几，只变个位。) 第 ‹#› 页 课时3 语法 返回目录 3．编码时都可用， 要注意写法的不同。 Page One ＝ the first page World War Ⅰ＝ the First World War Part Two ＝ the second part 第 ‹#› 页 课时3 语法 返回目录 　 基数词的习惯用法 1．表确切的数据：数词 ＋ hundred/thousand/million/billion ＋ 名词复数 如：六百本书 six hundred books; 几百万人 several million people 2．表大概的数目：hundreds/thousands/millions/billions of ＋ 名词复数 如：数百本书 hundreds of books 3．次数、倍数的表达，如：once, twice, three times, many times 第 ‹#› 页 课时3 语法 返回目录 　　序数词的用法 1．序数词的前面通常要加定冠词the；但当序数词前有形容词性物主代词或名词所有格修饰时，不用加定冠词the。 如：Tom lives on the sixth floor. 汤姆住在六楼。 Tom is her second child. 汤姆是她的第二个孩子。 2．分数的表达：分子用基数词，分母用序数词，分子大于1时，分母上的序数词用复数。 如：one fifth，two thirds，a half＝one second, a quarter＝one fourth 第 ‹#› 页 课时3 语法 返回目录 3．表示日期。 表示编号时，可用“the＋序数词＋名词”或“名词＋基数词”(注意，在“名词＋基数词”结构中，名词和基数词的首字母通常大写)。 如：Let's study the fourth lesson.＝Let's study Lesson Four. 让我们学习第4课。 如：Today is the ninth of May. 今天是5月9号。 第 ‹#› 页 课时3 语法 返回目录 　 数字运算的表达 ＋ plus; Add…and…　　　　　　　　－ minus; Subtract…from… × times/multiplied by; Multiply…by… ÷ divided by; Divide…by… 第 ‹#› 页 课时3 语法 返回目录 如：9＋3＝12　　　　　　　　 9－3＝6 Add 9 and 3, and you can get 12. Subtract 3 from 9, and you can get 6. ＝9 plus 3 is/equals 12. ＝9 minus 3 is/equals 6. 9×3＝27 9÷3＝3 Multiply 9 by 3, and you can get 27. Divide 9 by 3, and you can get 3. ＝ 9 times/multiplied by 3 is/equals 27. ＝ 9 divided by 3 is/equals 3. 第 ‹#› 页 课时3 语法 返回目录 　　惯用语 at first 起初　　　　　 first of all 首先　　　　　　　 first name 名字 second-hand 二手的 of the two/three 在两/三个当中 第 ‹#› 页 课时3 语法 返回目录 in twos and threes 三三两两 in one's thirties 在某人三十几岁的时候 　　　　　 in the 21st century 在21世纪 a second/third… 再一……；又一……　　 　　　　 in the 1970s 在二十世纪七十年代 第 ‹#› 页 课时3 语法 返回目录 (　　)1．(2023·山东期末)The girl is ________ years old.Today is her ________ birthday. A．nine；nine　　 B．ninth；ninth　　 C．ninth；nine　　　 D．nine；ninth (　　)2．(2023·天津期末)My little brother was born in __________. He will celebrate his ________ birthday next week. A．1990; eighteen B．1990s; eighteenth C．the 1990s; eighteen D．the 1990s; eighteenth D D 第 ‹#› 页 课时3 语法 返回目录 (　　)3．(2022·吉林期中)My mother will be ________ years old next week. I'm planning to buy a gift for her ________ birthday. A．fourty; fourtieth B．forty; fortieth C．fourty; fortieth D．forty; fourtieth (　　)4．(2022·辽宁期中)In the early ________ century, the first trains began to carry passengers. A．nineteenth B．nineteen C．nine D．ninetieth B A 第 ‹#› 页 课时3 语法 返回目录 (　　)5．(2023·广东期末)There are ________ of students in our grade and ________ of them are girls. A．hundreds; two hundred B．hundred; two hundreds C．hundreds; two hundreds D．hundred; two hundred A 第 ‹#› 页 课时3 语法 返回目录 02 课时过关 第 ‹#› 页 课时3 语法 返回目录 　　 用括号内所给词的适当形式填空。 1．It's said that about two _______ (three) of the earth is covered with water. 2．－Where is Class Five? －It is the _____ (five) classroom on the left. 3．We planted ________ (hundred) of trees last year. thirds fifth hundreds 第 ‹#› 页 课时3 语法 返回目录 4．______ (ten) of thousands of students took the college entrance exam on time on the morning of June 7th in South China, though it rained heavily. 5．To finish the task, we've tried three times, and after dinner we'll try a_______ (four) time. 6．－How old is your daughter? －Nine.We had a special party for her ______ (nine) birthday yesterday. Tens fourth ninth 第 ‹#› 页 课时3 语法 返回目录 7．Unit Six is easy but the________ (seven) unit is difficult. 8．This tall building has twelve floors.And Tony lives on the _________ (twelve) floor. 9．Linda's mother looks young, but actually she is in her_______ (sixty). 10．－When did you start to collect stamps? －I got my_______ (one) stamp when I was seven years old. seventh twelfth sixties first 第 ‹#› 页 课时3 语法 返回目录 　　请用be动词的正确形式填空。 1．A large amount of money ___ spent on shopping last year. 2．There ____ an amount of water in the tank. 3．A number of students _____ playing now. 4．The number of the boy students in our class _____ very small. 5．9 minus 3 ___________ 6. was is are is is/equals 第 ‹#› 页 课时3 语法 返回目录 　　语法填空。 阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式，并将答案填在相应的答题位置上。 (2022·深圳第二实验学校期中)Fibonacci, an 1．________(Italy), brought the number zero, along with the rest of Arabic numbers, back from his travels to northern Africa. However, the history of zero 2．____ (go) far deeper into history. There are at least two discoveries (发现) or 3．_________ (invent) of zero. It's said that zero came from a place of the Italian goes inventions 第 ‹#› 页 课时3 语法 返回目录 Middle East. It first 4．___ (get) to Babylon between 400 BC and 300 BC．Before it developed in India, it went through northern Africa, 5．___ then crossed from Italy to Europe. At first, zero worked 6．__ a way to tell 1 from 10 or 100 to give 7．__ example of using Arabic numbers. But that was not a full zero. A full zero was a number by 8．______ (it). It was the average (平均数) of－1 and 1. It began to be a number in India in the 9．_____ (five) century AD．The second appearance of zero happened in Mayan culture, probably in the first few centuries AD．An even 10．_______ (early) appearance of zero is used to mean an empty number about 4，000 to 5，000 years ago. got and as an itself fifth earlier 第 ‹#› 页 课时3 语法 返回目录 本节内容到此结束！ $$