本文目录
初中英语语法数词
一,基数词
1.基数词1至12是独立的单数,有各自的形式
one two three
2.基数词13至19是由各位数家后缀teen构成的,但要注意thirteen fifteen eighteen
3.基数词整十是由各位数字后缀ty构成,但需注意twenty thirty forty fifty eighty
4.其他非整十两位数是由整十位数加连字符-,再加个位数构成
twenty one
5.基数词100至999先写百位后加and再写十位和个位
three hundred and fifty nine
6.基数词1000以上的,先将数字从右向左数起,每三位数加一个逗号分隔开,第一个逗号前的数字用thousand,第二个逗号前的数字用million,第三个逗号前的数字用billion,读数字时从左向右三位数三位数的读
31,641,203,002
thirty-one billion, six hundred and forty-one million ,two hundred and three thousand ,and two
二,基数词的用法
1.表示数量的多少
I have two apples
2.表示年龄
I'm fifteen
3.表示倍数
一次用once,两次用twice,两次以上用基数词加times表示
This apple is twice as big as that one
The rom is three times bigger than that one
4.表示时间日期等
In the 1980s
三,序数词
1.序数词1至3为不规则变化
first second third
2.序数词四肢十就由基数词加th构成,但要注意fifth eighth ninth twelfth
3.序数词整十类如果基数词末尾有y,把y变为ie再加th
Tenth twentieth
4.几十类的基数词变序数词时,只需要把基数词的个位数变为序数词即可
twenty first twenty sixth
5.序数词的缩写形式
1st 2nd 3rd 4th
四,序数词的用法
1.用来表示事物的顺序
The second day
2.序数词前面加上不定冠词用来表示再一又一,除去序数词first
Will try it a second time
3.用序数词表示日期,前面可以加the,也可以省略
May the first
4.在形容词最高级前面,可以用序数词表示第几最。
This apple is the second largest I have ever seen
五,分数百分数小数
1.分数
单子用基数词,分母用序数词
分子是一分母用单数,分子大于一分母用复数
one-fifth two thirds
2.百分数
百分数用基数词加percent表示
five percent
3.小数
小数点读作point,小数点前后都用基数词表示
five point six
小学英语语法数词PPT
数词分为序数词和基数词两种。
基 数词表示数目,序数词表示顺序。
一、基数词
1.基数词1-12为独立的单词,
各 自有其形式: one、two、three、four、five、six,seven eight,nine,ten,eleven,twelve
2.基数词13-19都以teen结尾,单词中的两个音节都重读:
thirteen,fourteen,fifteen、sixteen,seventeen、eighteen,nineteen
3.基数词20-90等十位的整数都以ty结尾:
twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety
4.十位数和个位数之间要加“-”(连字符)。如: 65 sixty-five,98 ninety-eight
5.百在英语中是“hundred”;千是“thousand”;万是“ten thou- sand”;十万是“one hundred
thousand”;百万是“million”;千万 是“ten million”十亿是“billion”
注:五百是five hundred,而非 five hundreds; 五千是five thousand,而非 five thousands.
6.百位和十位数之间要加“and”。 如: 258 two hundred and fifty-eight
7.钟点表示法:
5:10 five ten 或ten past five 5:15 five fifeen 或a quarter past five
5:30 five thirty 或 half past five 5:50 five fifty 或ten to six
注:30分钟以前(含30分)介词用 past; 30分钟以后,介词用 to。
8.年份表示法: 1999 nineteen ninety-nine 2000 two thousand(twenty hundred) ·
二、序数词(序数词前通常要加定冠词 the)
1.前三个分别为:first、second,third
2.“第四一第十九”都由相应的基数词加“t”构成。注意有特殊 拼法的 fifth,eighth,ninth,twelfth.
3.十位数的序数词是由相应的基数词去掉词尾“y”,加“ieth”构 成.如: twenty(二十)-twentieth(第二十).
4.从第二十一到第九十九,前面是基数词,后面个位用序数词, 中间用“-”.如: 第95 the ninety-fifth,第64 the sixty-fourth.
5.第一百、第一千、第一百万分别在相应的基数词后加“th”: the hundredth,the thousandth,the
millionth.
6.日期表示法:
六月一日 June the first 或 the first of June 注:英语中的日期书写顺序为月日年。
如: She graduated on July 5,1999.(她毕业于 1999年7月5日。)
初中英语基础语法知识
初中英语基础语法5数词
数词
(一)基数词 在英语中表示数目的词称为基数词,初中英语基础语法5-数词。
1.基数词的构成
(1)1-20
one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,thirteen,fourteen,fifteen,
sixteen,seventeen,eighteen,nineteen,twenty
(2)21-99 先说“几十”,再说“几”,中间加连字符。
23→twenty-three,34→thirty-four,45→forty—five,56→fifty-six,67→sixty-seven,78→seventy-eight,89→eighty-nine,91→ninety-one
(3)101—999先说“几百”,再加and,再加末两位数或末位数;
586→five hundred and eighty-six,803→eight hundred and three
(4)l,000以上,先从右往左数,每三位数加一个“,”,第一个“,”前为thousand.第二个“,”前为
million,第三个“,”前为billion(美式)或thousand ,million(英式),然后一节一节地表示。
1,001→one thousand and one
9,785→nine thousand, seven hundred and eighty-five
18,423→eighteen thousand,four hundred and twenty-three
6,260,309→six million two hundred and sixty thousand three hundred and nine
750,000,000,000→seven hundred and fifty, billion(美式) seven hundred and fifty thousand million(英式)
2.基数词的'用法
(1)作主语
eg.Four Of them come from Paris.
(2)作宾语
eg.一 How many books would you like?
一I would like two.
(3)作表语
eg.Seven minus two is five.
(4)作定语
eg.There are three people in my family·
(5)作同位语
eg. You two will go swimming with us.
(6)表具体数字时,hundred,thousand,million用单数。
eg. There are six hundred students in our grade.
(7)表不确定的数字时,数词用复数。若带名词,再加of hundreds of(数百,成百上千的),thousands of(数干,成千上万的),millions of(数百万)
eg,They arrived in two sand threes.他们三三两两地来了。
(8)表示“…十”的数词的复数可以表示人的岁数或年代。
eg. He is in his early thirties.他有三十来岁(31—34岁):
This took place in the 1930s.这事发生在二十世纪三十年代;
(9)表示时刻
eg.I watch CCTV News at seven o’clock every evening.
(二)序数词 在英语中表示顺序、次序的词称为序数词,英语语法《初中英语基础语法5-数词》。
1.序数词的构成
(1)一般在基数词后加th
eg.four→fourth,thirteen→thirteenth
(2)不规则变化
one→first,two→second,three→third,five→fifth,eight→eighth,nine→ninth,twelve——~twelfih
(3)以y结尾的十位整数,变y为ie再加th
twenty→twentieth, forty→fortieth, ninety→ninetieth
(4)从二十一后的“几十几”直至“几百几十几”或“几千几百几十几”只将个位的基数词变为序数词。
twenty-first,two hundred and forty-fifth
2.序数词的用法
(1)序数词作定语时,一般要与定冠词或物主代词连用。
eg.Tom is their second son.
He is the first one to come here.
(2)序数词有时可与不定冠词连用,表示数量上“又—”,“再一”
eg: He tried a second time.他又试了—次。
Shall l ask him a third time?还要我再问他—次吗?我已问了他两次)
(3)序数词的缩写形式为:阿拉伯数字加上这个词的末尾两个字母。
1st 2nd,3rd,4th,20th,21st,22nd,23rd
(4表示年、月、日时,年用基数词,日用序数词。
2005年8月15日:(英)15,8,2005=15th,August,2005;(美)8,15,2005=August 15th,2005
(三)基数词和序数词都可以用来给数字编号。
No.1(1号),No.3bus(3路公共汽车),Room 103,(103号旁间)
The first lesson=Lesson Two(第二课)
(四)分数词的表达
分子用基数词,分母用序数词,分子大于1时,分母加s
eg.1/3-one third;2/5-two fifths
(五)数学运算的表达
eg.3+5=8 Three plus/and five is eight.
9-2=7 Nine minus two is seven.
6x5=30 Five times six is thirty /six unutilized five is thirty.
8÷2=4 Eight divided by two is four.
;初中英语语法数词用法教案
bulary book which became a work force in reading English. I then realized that a n
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