英語語法體系——數(shù)詞（num.)數(shù)詞的定義表示數(shù)目多少或者順序多少的詞，叫做數(shù)詞，數(shù)詞分為基數(shù)詞和序數(shù)詞基數(shù)詞：表示數(shù)字或者數(shù)量多少，如：one,

two,

three,

four…序數(shù)詞：表示順序，“第……”，如：first,

second,

third,

fourth…基數(shù)詞的基本構(gòu)成1-911-19整十幾十幾o(hù)neeleventen-twotwelvetwentytwenty-twothreethirteenthirtythirty-threefourfourteenfortyforty-fourfivefifteenfiftyfifty-fivesixsixteensixtysixty-sixsevenseventeenseventyseventy-seveneighteighteeneightyeighty-eightninenineteenninetyninety-nine基數(shù)詞的基本構(gòu)成英語是千分位制，所以沒有萬、十萬、千萬、億的概念100-----百-----hundred1,000-----千-----thousand1,000,000-----百萬-----million1,000,000,0000-----十億-----billion基數(shù)詞的讀法1、在讀三位數(shù)或三位數(shù)以上的基數(shù)詞十，需在十位數(shù)前（若十位數(shù)是“0”，在個位數(shù)前）加連詞and。342

-----

three

hundred

and

forty-two1,342

-----

one

thousand,

three

hundred

and

forty-two402

-----

four

hundred

and

two基數(shù)詞的讀法2、阿拉伯?dāng)?shù)字每三位數(shù)就需用一個“,”隔開，從后往前數(shù)。英語中沒有“萬”和“億”，如何表達(dá)相關(guān)數(shù)字？1萬可以用10千來表示，即10,000（ten

thousand）100,000,000可以寫成a

hundred

million25,485可以寫成twenty-five

thousand,

four

hundred

and

eighty-fivehundred,

thousand,

million與billion的用法1、與具體數(shù)詞one,

two…或several,

some,

many等連用時，要用單數(shù)形式six

hundred

people 600個人three

thousand

students 3,000個學(xué)生many

million

books 幾百萬本書hundred,

thousand,

million與billion的用法2、與of連用時，要用復(fù)數(shù)形式，但前面不能再加數(shù)詞hundreds

of

people成百上千的人thousands

of

students成千上萬的學(xué)生millions

of

books數(shù)以千計(jì)的書序數(shù)詞的基本構(gòu)成第一至第十第十一至第二十第二十一至第三十第整十至第一百firsteleventhtwenty-firsttenthsecondtwelfth

twelvetwenty-secondtwentieththirdthirteenthtwenty-thirdthirtiethfourthfourteenthtwenty-fourthfortiethfifthfifteenthtwenty-fifthfiftiethsixthsixteenthtwenty-sixthsixtiethseventhseventeenthtwenty-seventhseventietheightheighteenthtwenty-eightheightiethninthnineteenthtwenty-ninthninetiethtenthtwentieth

twentythirtieth

thirtyhundredth數(shù)詞的表達(dá)1、時間的表達(dá)整點(diǎn)：seven

o’clock（7點(diǎn)）半點(diǎn)：half

past

seven（7點(diǎn)半）幾點(diǎn)過幾分：five

past

seven（7點(diǎn)零5分）九點(diǎn)過六分：six

past

nine差幾分幾點(diǎn)：five

to

seven（6點(diǎn)55分）8點(diǎn)55分：five

to

nine、7點(diǎn)40分：twenty

to

eight十五分鐘：quarter數(shù)詞的表達(dá)2、日期的表達(dá)年份用基數(shù)詞，日期用序數(shù)詞1985年5月1日寫作：May

1(st),

1985

讀作：May

the

first,

nineteen

eighty-five 寫作：1(st)

May,

1985 讀作：the

first

of

May,

nineteen

eighty-five數(shù)詞的表達(dá)3、年代的表達(dá)in

the

1930s讀作：in

the

thirties

of

the

twentieth

century/

in

the

nineteen

thirties數(shù)詞的表達(dá)4、年齡的表達(dá)at

the

age

of

eighteight

years

oldeight-year-oldin

one’s

+整十基數(shù)詞的復(fù)數(shù)形式，表示“在某人幾十多歲時”。如：in

his

seventies在他70多歲時數(shù)詞的表達(dá)5、分?jǐn)?shù)的表達(dá)分子用基數(shù)詞，分母用序數(shù)詞；當(dāng)分子大于1時，分母要用復(fù)數(shù)形式。one

third三分之一one

fourth one

sixthtwo

thirds三分之二 two

fifths three

seventhsa/one

quarter四分之一three

quarters四分之三three

and

one

fourth三又四分之一數(shù)詞的表達(dá)8、倍數(shù)的表達(dá)表示兩倍用twice，表示三火三以上的倍數(shù)用“基數(shù)詞+times”。The

room

is

twice

as

big

as

that

one.這個房間是那個房間的兩倍大。This

tree

is

three

times

as

tall

as

that

one.這棵樹是那棵樹的三倍高。數(shù)詞的表達(dá)9、序數(shù)詞前用the與a/an的區(qū)別“the+序數(shù)詞”表示“第幾……”“a/an+序數(shù)詞”表示“又一，再一”The

apple

is

very

sweet,

and

I

would

like

a

second

one.蘋果很甜，我想再吃一個。I

ate

two

apples,

and

the

second

one

is

sweeter.我吃了兩個蘋果，第二個更甜。數(shù)詞的表達(dá)