高中英语语法专练-数词
第四章数词
表示数目多少或顺序多少的词叫数词，数词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
1）基数词写法和读法：345three hundred and forty-five；
2）基数词一般是单数形式，但下列情况，常用复数：
吉他f调
a. 与of 短语连用，表示概数，不能与具体数目连用，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"；
d. 表示"年代"，用in +the +数词复数；
e. 在乘法运算的一种表示法里，如：3 x 5 = 15 Three fives is (are) fifteen.
二、序数词
序数词的缩写形式：first---1st cond---2nd thirty-first---31st
三、数词的用法
1）倍数表示法
a. 主语+谓语+倍数（或分数）+ as + adj. + as
I have three times as many as you.我有你三倍那么多。
b. 主语+谓语+倍数（分数）+ the size (amount，length…) of…
The earth is 49 times the size of the moon.地球是月球的49倍。
c. 主语+谓语+倍数（分数）+ 形容词（副词）比较级+ than…
The grain output is 8 percent higher this year than that of last year.
今年比去年粮食产量增加8%。
d. 还可以用by+倍数，表示增加多少倍
The production of grain has been incread by four times this year.
今年粮食产量增加了4倍。
2）分数表示法
构成：基数词代表分子，序数词代表分母。分子大于1时，分子的序数词用单数，分母序数词用复数：
1/3 one-third ；3/37 three and three-venths.
数词
( )1.In this school, class begin at _____ in the morning.
A. half past ven
B. thirty ven
C. half over ven
D. ven and a half
( )2.May is _____ month of the year.
A. five
B. the five
C. fifth
D. the fifth
( )3.In Asia _____ were hunted and killed during the past fifty years.
钟秋洁A. nine tigers in ten
B. nine tigers of ten
C. ninth tiger in ten
D. nine tigers in tenth ( )4.The Winter Olympics are held _____.
描写牡丹的诗句A. every four year
B. every fourth year
C. every fourth years
D. every four years
( )5.Before the Civil war, _____ were forced to work on the farms in the Southern States.
A. ten thousand of slaves
B. ten of thousands of slaves
C. ten thousands of slaves.
D. tens of thousands of slaves
( )6.The lecture is likely to last ____ , so I’ll be back at 9:00 pm.
A. one and a half an hour
B. an hour and a half
C. an hour and half an hour
D. half and an hour ( )7.Mrs. Green is already in _____ , but she still studies law at a college .
A. her fifty’s
弦子的歌B. his fifties
C. the fifty
D. her fifties
( )8._____ of the earth _____ made up of oceans.
A. Two-third, is
B. Two-thirds, is
C. Two-third, are
D. Two-thirds, are
( )9.Since 1964, _____ satellites have been put into space.
A. dozens of
B. four dozens
C. dozen of
D. veral dozens
( )10.The Chine have been making paper for over _____ years.
A. two thousand
B. two thousands of
C. two thousand of
D. two thousands
( )11.The old fisherman cast the net _____ , but still caught no fish.
A. the third time美国人吃什么
B. a third time
C. three time
D. the third times
( )12.It will take _____ to finish the work, I think .恩组词
A. one and a half hour’s time
B. an hour and a half of time
C. one and a half hours’ time
D. an hour and a half time
( )13.There are ____ students in our class, ____ of whom are girls.
A. forty-five, four-nineths
B. forty-five, four-ninth
C. fourty- five, four-ninths.
D. forty-five, four-ninths
( )14.I have heard such stories ______.
A. a hundred of times
B. hundreds of times
C. a hundred time
D. two hundreds times ( )15.About _____ of the earth is a.
A. three-fourths
B. three-forths
C. thirds-fours
D. third-fours
( )16.He is a student of ______.
A. Class First
B. the Class One
C. Class One
个人简历表电子版D. First Class
( )17. —What’s the date today ? —It’s _____.
A. Friday
B. 8 March
C. March 8
D. the March 8th
( )18.The weight of the moon is only about _____ of that of the earth .
A. one eighty
B. first eighty新春祝福词
C. one the eightieth
D. one eightieth
( )19.We should remember that ____ people are still very poor.
