数词
基数词 序数词 ( 序数词前要加 the ) 常用不规则的序数词有以下几个: first, second, third, fifth, eighth, ninth, twelfth 学科网
一、基数词和序数词几种 常用用法(考点)
学科网 hundred , thousand , million , billion 的用法 基数词 + hundred, thousand, million, billion 表示 确切数目时 不能加 s ;例如: 5 千学生 基数词 + hundred, thousand, million, billion 表示 确切数目时 不能加 s ;例如: 5 千学生 但是:在表示不确切数目时,要用复数形式,如: hundreds of / thousands of students 但是:在表示不确切数目时,要用复数形式,如: hundreds of / thousands of students 成百上千 / 数以百计 成百上千 / 数以百计 成千上万 / 数以千计 成千上万 / 数以千计 数百万 数百万 数十亿 数十亿 Ex1 、 2 、 3 five thousand students
Zx.xk 基数词 + 单数可数名词 + (形容词)的用法(词间要用 “— ” 连接) 一个 8 岁的女孩 an eight-year-old gir l 一次两个月的假期 a five-metre-tall tree 一棵 5 米高的树 a two-month holiday Ex 4 、 5 、 6
基数词表示编号的用法 409 房间 五班 第九课 Room 409 Class 5 Lesson 9 基数词表示年代、年龄的用法 在 20 世纪 80 年代 in the 1980s/1980’s 在她 60 多岁时 in her sixties Ex7 、 5 、 8 、 9 日期用序数词,如 5 月 4 日 May 4(th) —— 读作 May the fourth or the fourth of May the fourth of May
基数词 +more 和 another + 基数词,都表示 “ 还有 ”“ 另外有 ” 的意思,例如: 下午放学前我们还要上多两节课。( M2/unit2 ) In the afternoon, we have _________ lessons before school finishes. Ex 10 two more another two
分数由基数词和序数词合成 1/3 1/3 2/3 2/3 分子大于 1 时,分母的序数词要用复数形式。 分子大于 1 时,分母的序数词要用复数形式。 特殊表达法 1/2 特殊表达法 1/2 1/4 1/4 3/4 3/4 基数词 / 序数词 a third two thirds one (a) half one (a) quarter / one (a) fourth three quarters Ex11 、 12
课外拓展 序数词前加定冠词 the 与加 a / an 的区别 the + 序数词:表示 “ 第几 ” ; a /an + 序数词:表示: “ 又一; 再一 ” 如: He is the fourth tallest boy in his class. We’ve tried it three times. Must we try it a fourth time? 注意 (1) 表示一次、两次、三次的用法 注意 (1) 表示一次、两次、三次的用法 Once 、 twice 、 three times Once 、 twice 、 three times (2) 一周一次 once a week (2) 一周一次 once a week (3) 一个半的两种表达方法。例如: (3) 一个半的两种表达方法。例如: 一年半 one year and a half or 一年半 one year and a half or one and a half years one and a half years
牛刀小试 1. Five hundred yuan a month _____ enough to live on. a. is b. are c. is being d. has been a. is b. are c. is being d. has been 2. ______ of the buildings were ruined. a. Three fourth b. Three four a. Three fourth b. Three four c. Three-fourths d. Three-four c. Three-fourths d. Three-four 3. The Olympic Games are held ______. a. every four years b. every four year a. every four years b. every four year c. every fourth years d. every four-years c. every fourth years d. every four-years 4. As he is not in good health, he goes to his factory only ______ just to learn something about the production. to learn something about the production. a. once a week b. one week a. once a week b. one week c. one time a week d. one a week c. one time a week d. one a week
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