高中英语语法复习数词

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His salary rises from 20 dollars a week to 35 dollars a week.
加减乘除表示法
❖ 1. “加”用plus,and或add表示; ❖ “等于”用is,make,equal等词表示。 ❖ 2+3= 可表示为:How much is two plus
❖ 在我们班她是第二名。(作表语)
序号表示法
(1)单纯的序号,可在基数词前加number,简写为No.。 如:No.1 第一号
(2)事物名词的序号表达法有所不同: ❖ ①对于一些小序号可用序数词也可用基数词表达,形式分别
为:the + 序数词 + 名词 / 名词 + 基数词。 ❖ 如:第一次世界大战可以表示为 ❖ the First World War = World War One, ❖ Lesson 8 = the eighth lesson ❖ ②对于一些大序号我们通常只用一种表达法, ❖ 即名词 + 数词。 ❖ 如:501号房间表示为 Room 501, ❖ 538路公共汽车表示为 Bus 538。 ❖ ③可用a / the + number + 基数词 + 名词。 ❖ 如:a No.5 bus一辆五路公共汽车, ❖ the No.8 bus那辆8路公共汽车。
They produced more products in 2001 than those in 2000 by twice.
The production of grain has been increased by four times this year.
(3)倍数用在表示度量名词前,其基本结构为:
twelve. Three multiplied by four makes
twelve. 三乘以四等于十二
❖ 4. “除”用divide的过去分词形式表示 ❖ 16÷4= How much is sixteen divided by four
❖ 16÷4=4 Sixteen divided by four is four. Sixteen divided by four equals/gives/makes four.
❖ 0.4 zero point four或point four 零点四 10.23 ten point two three 十点二三 25.67 twenty-five point six seven 二十五点六七 l.03 one point o three 一点零三
倍数的表达方式
once, twice, three times, four times…
two dozen eggs,
three score of girls/three score days,
six thousand…
hundreds of , dozens of , thousands of,
tens of thousands of, millions of…
❖ 基数词一般是单数形式,但下列情况,常用复数: a. 与of 短语连用,表示概数,不能与具体数目连 用,
❖ 3. “乘”用time(动词)或multiply表示 3X4= How much is three times
four 3X4=12 Three times four is/are twelve.
❖ Three fours is/are twelve. Multiply three by four,and we get
50% fifty percent 3% three percent ❖ 分数和百分数后面不能直接接名词或代词,而用以下形式:
分数/百分数 +of + the /these/those/my+ 名词 / 代词, 其谓语动 词与of后的名词在人称和数上保持一致,如: Two-thirds of the money was spent on food.
基数词的句法功能
基数词在句中可作主语、宾语、定语、表语、同位语。
The two happily opened the box. 两个人高兴地打开了盒子。(作主语) I need three altogether. 我总共需要三个。(作宾语) Four students are playing volleyball outside. 四个学生在外面打排球。(作定语) We are sixteen.我们是16个人。(作表语) They three tried to finish the task before sunset. 他们三个人尽力想在日落前完成任务。(作同位语)
❖ 2. "减"用 minus或 take from表示 10-6= How much is ten minus six
10-6=4 十减去六等于四 Ten minus six is four.
Take six from ten and the remainder is four. Six (taken) from ten is four.
分数表示法
❖ 分数是由基数词和序数词一起来表示的。 ❖ 基数词作分子,序数词作分母,除了分子是“1”以外,其它情
况下序数词都要用复数形式。 3/4 three fourths或three quarters 1/3 one third或a third 24/25 twenty-four twenty-fifths 3 1/4 three and one fourth或 three and one quarter 1/2 a half 1/4 one quarter或a quarter 1 1/2 one and a half 百分数用基数+percent表示
Seventy percent of the earth surface is covered by water.
One third of the students are from the town.
分数的其它表达形式:
❖ 分子与分母之间加in, 分子在前,分母在后, 分子分母都用基数词。
❖ 如:one in ten 十分之一, ❖ five in eight八分之五。 ❖ 分子与分母之间加out of , 分子在前,分母
倍数 + the +size/length/weight… + of + 表示比较对象的名词,
This room is three times the size of that one.
大约数的表示方法
(1)用dozen、score、hundred、thousand、million等数词的复数 后加of短语来表示几十、几百、上千、成千上万等大约数概念。
(1)倍数用在as + 形容词 / 副词(原级)+ as结构之前。 They have three times as many cows as we do.
(2)倍数放在形容词或副词的比较级之前或by + 倍数用在比较级 之后。如:This rope is four times longer than that one.
❖ If you divide 16 by 4, you get 4. 十六除以四等于四。
数词考点及复习要点
虽然数词并不是近几年的考查重点,但我们在 复习时还是需要搞清楚以下几个概念: 1、数词的基本用法及比较; 2、数词的位置; 3、倍数词的表达习惯; 4、在习惯用语中数词的用法;
数词的基本用法
today as they did in 1910. (2002上海春) A. more than twice B. as twice as many C. twice as many as D. more than twice as many
表示“几十岁”;用 in one’s + 数词复数,如: He began to work in his teens. 表示"年代",用 in +the +数词复数;
数词的基本用法
考题点击2 ____ of the land in that district __C__ covered
with trees and grass. ( 2000上海)
高中英语语法复习数词
一、数词的分类:
主要分为基数词和序数词 ❖ 表示数目多少的数词叫基数词 ❖ 表示顺序的数词叫序数词
一 基数词、序数词:
二 分数、小数、百分数:
❖ 基数词在表示确切的数字时,不能使用dozen(12)、 score(20)、hundred、thousand、million 、 billion的复数形式;但是,当基数词表示不确切数 字,如成百、成千上万,三三两两时,基数词则以 复数形式出现。
three
❖ 2+3=5 可以用以下5种方式表达: ❖ Two plus three is five.
Two and three is equal to five. Two and three make five. Two added to three equals five. If we add two to/and three, we get five
(2)用less than、under、below、almost、nearly、up to 等来表示 小于或接近某数目。
He is good at English, so he can finish the paper in less than two hours.
(3)用more than、over、above、beyond、or more等来表示超过 或多于某个数目。如:
如scores of people 指许多人; b.在一些表示"一排"或"一组"的词组里;
如:They arrived in twos and threes. 他们三三两两的到达了。 c. 表示"几十岁";in one’s thirties d. 表示"年代",用 in +the +数词复数;in the 1980s e. 在乘法运算的一种表示法里, 如:3 x 5 = 15 Three fives is (are) fifteen.
考题点击1 It is not rare in ___D__ that people in ____ fifties are
going to university for further education.
(99上海)
A. 90s, the
B. the 90s, /
C. 90s, their
D. the 90s, their
序数词的句法功能
❖ 序数词在句中可作主语、宾语、定语和表语。 The second is what I really need. 第二个是我真正需要的。(作主语) He choose the second. 他挑选了第二个。(作宾语) We are to carry out the first plan. 我们将执行第一个计划。(作定语) She is the second in our class.
Peking University has a history of more than 100 years. (4)用or、or so、about、around、some、more or less等表示在某
一数目左右。
About 50 people were present at that time. (5)用to、from … to…、between … and表示介于两数词。如:
在后,分子分母都用基数词。 ❖ 如:one out of ten十分之一, ❖ five out of eight八分之五
小数表示法
❖ 小数用基数词来表示,以小数点为界,小数点左首 的数字为一个单位,表示整数,数字合起来读;小 数点右首的数字为一个单位,表示小数,数字分开 来读;小数点读作 point,o读作 zero或o,整数部分 为零时,可以省略不读.
A. Two fifth, is
B. Two fifth, are
C. Two fifths, is
D. Two fifths, are
分数和百分数作主语时,关键是看其后的名词来 决定其谓语动词的数。该题中的是不可数名词, 所以动词需用单数。
数词的基本用法
考题点击3 Americans eat ___D___ vegetables per person
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