本文目录
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.
;英语数词的用法英语教案
数词在英语句子中可以作主语、表语、宾语、同位词、定语等成分。
1.作主语
Eight is a good number.
8是一个好数字。
Five is chosen by many people.
许多人选择数字5。
2.作表语
You are nine.He is the second.
你是9.他是第2.
3.作宾语
Many people love 8.
许多人喜欢8。
4.作同位语
You three are special.
你们三人很特别。
5.作宾语
100 bottles are far from enough.
100个瓶子远远不够。
She won the second place.
她获得第二名。
注意:基数词+名词(度量词)常能修饰形容词或者副词。
10 meters long 10米长
100 yards wide 100码宽
1000 meters high 1000米高
90 years old 90岁
three timesfaster快三倍
10,000 times better 好一万倍
本文作者:丹丹英语(公众号:英语语法学习)
本文已获转载授权,版权归作者所有,如需转载,请联系原微信公众号“英语语法学习”。
初中英语数词知识点总结
基数词一般是单数形式,但下列情况,常用复数: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":dozens of ages;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. 部分基数词
(1)位于another,all之后,如:Can you have another two cakes? 你还能吃2块蛋糕吗? The boy lost all the five pencils last week.这孩子上周把5枝铅笔全丢了。 (2)位于such和more之前,如:I can finish reading two such books in two days.两天里我能读完这样的两本书。Please give me one more apple to eat.请再给我一个苹果吃。 (3)可置于last,next,other之前或之后,如:His last two books are written in English.他的后两本书是用英语写的。
A.dozen,score,hundred,thousand,million等数词前面有基数词或某些表示数量的形容词时,不加-s。例如 a few hundred meters 几百米 several million people 数百万人 two thousand teachers 两千位老师,但如表示“几百”“几千”“几百万”等笼统的数目时,则应用-s of构成短语。如:hundreds of books 几百本书 thousands of workers 几千个工人
B.表示一百,一千,一百万时需加上one或不定代词a。如:1000 a thousand 1031 a thousand and thirty-one 1100 one thousand ,one hundred 1498 one thousand,four hundred and ninety-eight 比较数字的开头多用不定代词a(见前两例),但在一个有百位数的数目前或在一个数目中间,则要用one
倍数的表达方法 :1.用…times表示。如: My room is three times as large as yours. 我的房间是你的三倍大小。 如果表示“是……两倍数”,一般用twice。如: My room is twice as large as yours. 我的房间是你的两倍大小。 2.用-fold表示。如: The value of the stock has increased two-fold since we bought it . 股票的价值已涨至我们购买时候的两倍。 3.用-%表示。如: The collection of our school library is 200% up compared with 1998. 我们学校图书馆藏书量与1998年相比增长了一倍. 4.用double(翻一番),triple(三倍于),again等词表示倍数。如: This coat cost me as much again as the coat I have just bought. 这件外套和我刚买的那件外套的价格一样。
分数、小数和百分数表示法:分数的分子以基数词表示,分母以序数词表示,当分子大于1时,序数词要用复数
“大约”的表示法 :(1) about, approximately, around, more or less, roughly, some等词 数词,或数词 more or less, or so, or thereabouts等词 (2) 基数词或阿拉伯数字末尾 -ish (3) 十位数 -s
数词的特殊用法:1.a 序数词(再一……,又一……)和the 序数词(第……) I’ll see the movie a second time.(再看一次) 2. 具有夸张含义的成语中的数词并不表示具体的数
初中英语语法数词课件
bulary book which became a work force in reading English. I then realized that a n
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