2022暑假仁爱版英语八年级下册 专题七 数词 讲义（无答案）

专题七 数词
【考点展示】
掌握基数词、序数词的基本用法
掌握 hundred， thousand， million ，billion 表达确数和概数时的用法
掌握分数的表达法
【知识梳理】
一、基数词的用法
表数量的多少
表示年份，如 1988 年读作 nineteen eighty-eight
表时刻，如 7:00 读作 seven o’clock
表示顺序。单数名词+基数词，名词的第一个字母要大写。如 Class Two; Room 12 ; No.3 Middle School 注意：“单数词+基数词”可以转换成“the + 序数词 +单数名词”，此时第一个字母不大写。如：Lesson Three = the third lesson
“基数词+单数名词”相当于合成形容词作定语。 如：a three- year- old girl. 合成形容词不能作表语，后面必须跟上所修饰的名词。
与表示时间、距离、长度的名词一起构成“基数词+单位名词+形容词”，表示事物的形状、年代及距离。 如 ten years old; 3000 meters long
“几十”的基数词复数形式可用来表示某人几十多岁或表示年代。
e.g. : In his sixties, he rode a bike round the world. The light was invented in the 1870s.
与 another, more 连用时，表示在已有的基础上增加一定的数量。如：another three hours
hundred、thousand、million、billion 等词表示确定数目时，直接在其前面加基数词；表示不确定数目时， 要在它们后面加-s，其后还要加 of。
e.g. : three hundred students ; 三百名学生 thousands of students 成千上万的学生
二、序数词的用法
序数词表示顺序
序数词前面须有定冠词 the,后接单数名词
序数词前若出现形容词性物主代词、名词所有格等限定词，则不加 the
e.g. ： Today is my birthday.
序数词前面也可以加不定冠词 a 或 an,表示“又一、再一”，内含顺序性。
e.g. : She had a second child.
三、分数
1.分子用基数，分母用序数。分子为 1，分母用单数；分子大于 1，分母用复数
e.g. 五分之一 one fifth ; 五分之三 three fifths
注意一些习惯用法：
1/4 也可以表示为 a quarter ; 3/4 可以表示为 three quarter, 1/2 也可以表示为 a half 2.带分数的短语作句子的主语时，谓语动词的单复数与分数后的名词保持一致。
e.g. ：Two fifths of the apple is eaten. Two fifths of the apples are eaten.
【专项强化】
Two months ago, China tasted its aircraft carrier (航空母舰)built completely on its own.
A. one B. first C.the one D.the first
of the land in that town covered with trees and grass.
A. two fifth; is B.two fifth; are C.two fifths; is D.two fifths; are 3.The apartment has floors and Mr. Smith lives on the floor with his family.
A. twelve; twelve B. twelfth; twelve C. twelve;twelfth D. twelfth; twelfth 4.——“Food Safety” has become one of the hottest topics recently.
——Yes,it receives Internet hits a day.
A. thousands B. thousands of C.thousand D.hundreds 5.——Would you like another cup of coffee, Linda
——Thank you anyway. I have already had one cup, and I’m drinking cup.
A. one B. the first C.the second D.the third
In our city, the number of the teachers about 2,000， but only about of them are men teachers.
A. is; seven hundreds B. are; seven hundreds
C. is; seven hundred D. are; seven hundred
students went to the university to listen to the speech.
A. Thousand of; 120-minutes B. Thousands of; 120-minutes
C. Two thousands ; 120-minutes D. Two thousand ; 120-minute 8.——Can you write the number sixty-five thousand, six hundred and twenty-six
——Yes, it’s
A. 65,662 B. 65,626 C.56,662 D.56,626
9. ——Mr. Wang , I am afraid I can’t finish the work in two days.
——Don’t worry. I will give you days.
A. two another B. two more C.more two D.two many 10.——How old is your son ？
—— . We had a special party for his birthday yesterday.
A. nine; nine B. Ninth; nine C.nine; the ninth D.nine; ninth 11.——Who won the first prize of the World Table Tennis Championship
——You mean the match held in Ma Long did.
A. fifty-four; German B. fifty-fourth; Germany C.fifty-fourth; German D.fifty-four; Germany
My little sister got books as gifts on Children’s Day, twenty-four storybooks and sixteen picture books. A.fourteen B. fortieth C.forty D.fourteenth
Please turn to page and take a look at the picture on it. A.the eightieth B. eightieth C. eighties D.eighty
——A recent survey shows that 35 out of 45 students in my class will save their phones first in a fire.
——About of the students made such a choice Life is far more important , isn’t it
A.half B. one third C.two third D.three quarters 15.——English is becoming a popular tourist destination now.
——I think so. people come here every summer vacation.
A.Hundreds and hundreds of B.Hundred and hundred of C.Hundreds and hundreds D.Hundred and hundred
【总结反思】
本次专题我学到了