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小学生英语数词基本语法与练习
知识要点
表示“多少”和“第几”的词,叫数词。数词分为基数词和序数词两种。
1)基数词:在十位数词和个位数词中间 ( http: / / www.21cnjy.com )加上连字符 “ - “ 。如: 21 twenty -one‘基数词三位以上的数词, 在百位和十位之间,一般要用连词"and “。 如: 132 one hundred and thirty-two.【来源:21·世纪·教育·网】
表示”万“的词英语中没有。如1万可用1 ( http: / / www.21cnjy.com )0千来表示。 ten thousand. 30万可用 three hundred thousand 来表示。 21*cnjy*com
基数词的用法:
1.编号的事物用基数词: 如:Lesson Five, Room 101
2.表示”年,月,日“ 时用基数词。
3.表示 “几点钟, 几点过几分” 用基数词。 It is two to two. 现在是两点差两分。
4.加减乘除用基数词。 One plu ( http: / / www.21cnjy.com )s two is three.一加二等于三。Eight minus four is four. 八减四等于四。21cnjy.com
Two times two is four.二乘二等于四.Ten divided by two is five.十除二等于五。
5表示百分数用基数词.
Thirty percent of them is water. 它们当中有30%的水。
6.表示分数时,分子数字用基数词, 但分母要用序数词, 如分子不是1,序数词要用复数形式。
One-fifth of the books are mine. 三分之一的书是我的。
Three-tenths of water is disappeared. 十分之三的水不见了。21世纪教育网版权所有
2)序数词:表示数目顺序的词用序数词。
1.序数词1━19 除第一,第二,第三,第五,第八,第九, 第十二变化不规则外, 其余均由在基数词后加上 -th。21·世纪*教育网
2.十位整数的序数词的构成方法是, 是将十位整数基数词的词尾 -y 变成 i 再加 -eth。
3.几十几的序数词,只是把个位数变成序数词, 十位数不变。
4.第一百以上的多位序数词 由基数词的形式变结尾部分为序数词形式来表示。
one hundred ( http: / / www.21cnjy.com ) and twenty-first ,one thousand,three hundred and twentieth
5.序数词的缩写形式 有时,序数词可以用缩写形式来表示。主要缩写形式有。
first--lst second ( http: / / www.21cnjy.com )--2nd third--3rd fourth--4th sixth--6th twentieth--20th twenty-third--23rd 其中lst,2nd,3rd为特殊形式,其它的都是阿拉伯数字后加上th。21教育网
6.通常前面要加定冠词 the;但是如果序数词前出现不定冠词a或an时,则表示“再”,“又”.
We’ve tried it three times.Must we try it a fourth time?【来源:21cnj*y.co*m】
7.基数词也可以表示顺序。只需将基数词放在它所修饰的名词之后(名词需大写) 即可,不需要添加定冠词。【版权所有:21教育】
the first lesso ( http: / / www.21cnjy.com )n-Lesson One ,the fifth page-Page 5, the twenty-first room-Room 21
练习
( )1. I‘ve read ______ sports news about the F1 race today.www.21-cn-jy.com
A. two B. pieces C. two pieces D. two pieces of
( )2. During Wo ( http: / / www.21cnjy.com )rld War II, a Jewish(犹太)lady was protected by a local family in Shanghai in her ______.2-1-c-n-j-y
A. fifties B. fifty C. fiftieth D. the fiftieth
( )3. The river thro ( http: / / www.21cnjy.com )ugh our city, which is a about _________, is clean again.
A. 6000 meters long B. 6000-metres-long
C. 6000-metre-long D. 6000 meter long
( )4. I stu ( http: / / www.21cnjy.com )dy in Yu Cai Middle School. There are two ____students in our school.
A. thousand B. thousands C. thousand of D. thousands of2·1·c·n·j·y
( )5. They said they would have holiday.
A. a two-month B. two months C. two-months D. two-month’s【出处:21教育名师】
( ) 6.-When was the PLA founded?
-It was founded on ____.
A. July 1. 1921 B. October 1.1949
C. May 1.1922 D. August 1.1927
( ) 7. In ( http: / / www.21cnjy.com )the past two years, many tall buildings have been built in our city. The tallest is an that stands in the centre.21·cn·jy·com
A. 80-floor building B. 60-floor building
C. 80-floor buildings D. 70 floors building
( )8.The number o ( http: / / www.21cnjy.com )f people invited ____ fifty, but a number of them _____absent for different reasons.www-2-1-cnjy-com
A. were ; was B. was ; was C. was ; were D. were ; were\
( )9.- How soon will you finish your work? -In about _______.
A. one and a half month B. one month and a half
C. one and half a month D. a month and half
( )10.-Would you like some fruit, madam? -Oh, yes. _______, please.
A. 5 kilo bananas B. 5 kilos of bananas
C. 5 kilo of bananas D. 5 kilos of banana
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