初中英语数词讲解及专项练习.doc

数 词
一．数词含义：数词分为基数词和序数词。表示数目和数量的词为基数词；表示数目顺序的词为序数词。
二．基数词
基数词

1-100 (略)
ten / one hundred / one thousand / ten thousand / one hundred thousand
one million / ten million / one hundred million / one billion

123 one hundrend and twenty-three
1,234 one thusand, two hundred and thirty-four.
12,345 twelve thousand, three hundred and forty-five

( 千位与百位之间用 逗号 连接, 百位与十位之间用 and 连接, 十位与个位之间用 连字符 - 连接 )

three hundred ( hundred 没有复数, 不能加s； hundred 前面只能用数字, 不能用 many 和 a few )
hundreds of ( hundred 如果加s, 后面必须接 of )
five thousand ( thousand 没有复数, 不能加s；thousand 前面只能用数字, 不能用 many 和 a few )
thousands of ( thousand 如果加s, 后面必须接 of )
三．讲解序数词
序数词
first second third fourth fifth
sixth seventh eighth ninth tenth
eleventh twelfth thirteenth fourteenth fifteenth
sixteenth seventeenth eighteenth
nineteenth twenty-first twenty-second

twentieth thirtieth fortieth fiftieth sixtieth
seventieth eightieth ninetieth one hundredth

四．数词的表示法

Lesson Three: 第三课 page four six three: 第463页 page five o seven: 第507页
Room three o five: 第305房间： Seventy-six Chang’an Stree: 长安街76号
in his fifties: 在他50多岁的时候
January twenty-eighth February fourteenth October first

年代: 1978: nineteen seventy-eight 2008: two thousand and eight
2010: two thousand and ten 1900: nineteen hundred
1908: nineteen and eight / nineteen hundred and eight
1960s（1960’s）: 二十世纪六十年代 ( in the 1960s / in the 1960’s )

钟点: 8：45 eight forty-five / a quarter to nine
9：15 nine fifteen / a quarter past nine
10：03 ten three / three past ten
11：30 eleven thirty / half past eleven

小数的读法： 1.25 : one point two five 3.728 : three point seven two eight
0.56 : (zero) point five six / (naught) point five six

百分数的读法： 5％ : five percent； 20％ ：twenty percent；
100％ : one hundred percent
0.5％ : zero point five percent ( naught point five percent )

分数表示法: 分子用基数词, 分母用序数词. 分子大于 1 时, 分母用复数形式.
1/5 : one fifth； 2/5 : two fifths； 1/4 : a quarter / one fourth
3/4 : three quarters / three fourths；
5 1/2 : five and a half； 7 2/5 : seven and two fifths

在数学课上，可以这样读分数：
1/2 ： one over two 2/3 : two over three
3/4 : three over four 11/20 : eleven over twenty

数词专项训练

1． He became a famous writer in his .
A. thirty B. thirtieth C. thirties D. thirty’s
2． -- How often do you go to the movies ? -- a month.
A. two B. second C. the second D. twice
3． My office is on floor.
A. twelve B. twelfth C. twelveth D. the twelfth
4． There are more than three people in the park.
A. hundred B. hundreds C. hundreds of D. hundred of
5． The weight of the moon is only about one of the earth.
A. eight B. eighth C. eighty D. the eighth
6． Mr Brown’s room is on the third floor.
A. Room 309 B. 309 Room C. the Room 309 D. the 309 Room
7． China is largest country in the world.
A. the B. three C. third D. the third
8． There are workers in this factory.
A. five thousand and two hundred and sixty-five
B. five thousand and two hundred and sixty five
C. five thousand, two hundred and sixty-five
D. five thousands, two hundred and sixty-five
9． Tom is a boy.
A. 12 year old B. 12 years old C. 12-years-old D. 12-year-old
10．About of the students in my class are girls.
A. three fifth B. three fifths C. third five D. third fives
11．There is not enough room for us .
A. four B. the four C. fourth D. the fourth
12．Ten years a long time.
A. were B. is C. are D. be
13．I was exhausted after walk.
A. six hours B. six hour’s C. six hours’ D. six hour
14．Coca Cola started to enter China’s market .
A. in 1970’s B. in 1970s C. in the 1970s’ D. in the 1970s
15．My apartment is on floor of this building.
A. thirty B. thirtyth C. the thirtyth D. the thirtieth

CDDAB ADCDB ABCDD