资料简介
数词
一 、数词和的构成
(一)数词的分类:数词分为基数词和序数词。
基数词表示数目的多少。序数词表示事物的先后
顺序,往往与定冠词the 连用。
1.基数词的构成
(1)0—12单独记。如: zero, one, two, three等。
(2)13—19的词尾都是teen。如:fourteen,
seventeen等,但13—thirteen,15—fifteen,18—
eighteen需要特殊记。
(3)20以上的整十的基数词均以ty结尾。
20—twenty,30—thirty,40—forty,50—fifty
,80—eighty等。
(4)“几十几”要加连字符号“”。
48—fortyeight, 97—ninetyseven等。
(5)“几百几十”或者“几百几十几”在“百”后
加and。
156—one hundred and fiftysix, 509—five
hundred and nine。
2、再次观察表格归纳:
1)基数词13-19,由后缀________构成,注
意:thirteen, _________, ______ ___
有变化;
2)基数词20-90等整十位数,由后缀
________构成,注意:thirty,
__________, ________,__________有变化。
teen
fifteen eighteen
ty forty
fifty eighty
(6)四位数或者四位数以上的基数词的拼写规律:
用逗号从右往左每三位加一个逗号,第一个逗号
读作thousand(千),第二个逗号读作million(百万)
,第三个逗号读作billion(十亿),hundred后莫忘
“and”。
3,610=three thousand six hundred and ten;
94,295=ninetyfour thousand two hundred and
ninetyfive;
274,350=two hundred and seventyfour
thousand three hundred and fifty等。
【巧学妙记】
100以内的基数词
基数词不难记,找清规律很容易,
十二以内词各异,十三数到十九来,teen莫忘记。
二十、三十……至九十,尾巴要把ty加。
要说“几十几”,中间“”别丢弃。
若说几百几十几,百位十位用and。
以上用法要记住,用时千万莫大意。
2.序数词的构成first 1st
second 2nd
third 3rd
fourth 4th
fifth 5th
sixth 6th
seventh 7th
eighth 8th
ninth 9th
tenth 10th
eleventh 11th
twelfth 12th
thirteenth 13th
fourteenth 14th
fifteenth 15th
sixteenth 16th
seventeenth 17th
eighteenth 18th
nineteenth 19th
twentieth 20th
twentyfirst 21st
twentysecond 22nd
thirtieth 30th
fortieth 40th
fiftieth 50th
sixtieth 60th
seventieth 70th
eightieth 80th
ninetieth 90th
hundredth 100th
one hundred and first 101st
first 1st second 2nd
third 3rd fourth 4th
fifth 5th sixth 6th
seventh 7th eighth 8th
ninth 9th tenth 10th
eleventh 11th twelfth 12th
thirteenth 13th fourteenth 14th
fifteenth 15th sixteenth 16th
seventeenth 17th eighteenth 18th
nineteenth 19th twentieth 20th
(1)“第一”、“第二”、“第三”分别是
first, second, third。
(2)“第四”到“第十九”除了fifth, eighth,
ninth, twelfth是特殊的拼写外,其余的都在
相应基数词后面加“th”构成。如:fourth。
(3)20以上的整十的序数词由相应的基数词变y
为i,再加“eth”。如:thirty→thirtieth;
fifty→fiftieth。
(4)第一百hundredth; 第一千thousandth; 第
一百万millionth。
(5)20以上的非整十的基数词变序数词时,只
变化个位数。如:twentyone→twentyfirst; one
hundred and one→one hundred and first。
基数词变序数词的巧记口诀:
基变序,有规律,
一、二、三特殊记, first, second, 和third
,
从四开始加th, 八去t,九去e,
五和十二变ve为f再加th,
整十变y为ie再加th,
若想表示几十几,只变个位就可以。
专题四 数词
归纳:记忆技巧
基变序,有规律,词尾加上______;
(fourth,sixth)一、二、三,特殊记,
结尾字母st,nd,rd;(first,second,
third) 八____,九去___,(eighth,
ninth)ve要用____替;(fifth,
twelfth)ty将y改成 ____,再加th,若是碰
到几十几,只要变个位就可以。
th
t efie
【提醒】(1)序数词前要加定冠词the,若序数词前
有形容词性物主代词或名词所有格时省略the。
Bill is my first pen pal.
比尔是我的第一个笔友。
(2)序数词前加a/an表示“又一,再一”。
Even though the Browns have three children,they
still want a fourth one.
尽管布朗夫妇已有三个孩子,可他们还想再要一个。
2.表编号 结构:
名词(首字母要大写) + 基数词
= the +序数词 +名词
Lesson One = the first lesson
Page 5(five)=the fifth page
Room 21(twenty-one)
=the twenty-first room
3.时刻表示
时间表达.pptx
4.年月表示法
1.世纪=定冠词+序数词+century表示,也可以
用定冠词+百位进数+`s表示
the sixth/6th century=the 500’s 公元六世纪
the 1900`s 二十世纪 the 1600`s 十七世纪
2. 年代用定冠词+基数词+十位整数的所有格或
复数形式构成
in the 1930`s/in the 1930s(in the thirties of
the twentieth century或 in the nineteen
thirties)
在二十世纪三十年代;在十九世纪六十年代
5.日期 在具体哪一天要添加介词on。
National Day is on Oct. 1.
(October first也可以表示为 National Day is
on the 1st of October.)
May 5(th) 五月五日(读作May fifth)
也可以表示为the fifth(5th)of May
Mar. 1(st)(读作March first或 the first of
March)
( )1. There are ______ days in a
week(海淀区)A. the seven B.
seventh
C. the seventh D. seven( )2.
December is the ______ month in a
year. (吉林) A. twenty B. twelve
C. twelfth D. twentieth
.
3.分数的构成
分数是由基数词作分子,序数词做分母构
成的。除了分子是“1”的情况外,序数词
都要用复数。
1/3 one third
7/9 seven ninths
注意
一些特殊的分数表达法:a half 二分之一
a quarter =one fourth 四分之一
three quarters=three fourths
专项集训
1.(2016年衡阳)—Hi,Andy! There are ______
floors in this building. Which floor do you live on?
—I live on the ______ floor.
A. thirty; twentysecond B. thirty; twenty
two
C. thirtieth; twentytwo
2.(2016年湘潭) vistors come to Shaoshan
to celebrate Chairman Mao’s birthday on
December 26th every year.
A.Thousand of B.Thousands of
C.Thousand
A
B
3.(2016年毕节改编)A year is divided into
12months.August is the month of the
year.
A.twelve; B.eighth
4.(2016年温州)—Welcome to Los
Angeles.Have you ever been here?
—Sure.I visited this city three years
ago so this is my ____ time here.
A.first B.second C.third
B
B
5.(2016年咸宁改编)—The__________Brazil's
Olympic games will be held on August 5.
—_________exciting news for the long summer
vacation!
A.thirtyone; How a
B.thirtyfirst; What
C.thirtyfirst; What an
B
1. volunteers will give out leaflets to ask
people to protect the wetlands.
A. Two hundreds B. Hundreds of
C. Two hundred of
2. —Excuse me, which is the way to the
museum?
—Sorry, I don't know. This is my_______
time here.
A. first B. second C. third
B
A
3.There are days in a week and Tuesday
is day of the week.
A. seven,third B. seven,the third
C. seventh,three
4—Li Jiacheng plans to give _______ of his
money to the charity.
—Really? What a kind man he is!
A. one third B. one three C. one thirds
B
A
5.Last year, one hundred English teachers
took part in the ________ English Summer
Training.
A. twomonth B. twomonths C. two months
6— How was your weekend?
—Great! It was my grandfather's
birthday. We enjoyed ourselves.
A. seventy B. seventieth
C. the seventieth
A
B
7. There are teachers in our school,
_____of them are women teachers.
A. two hundreds; three fourth
B. two hundred; three fourths
C. two hundred; three forths
8. Three students ran faster than Lily in the
race. Lily was________.
A. the fourth B. four C. the third
B
A
查看更多