中考英語語法之數詞
數詞表示數目多少或順序多少的詞叫數詞，數詞分為基數詞和序數詞。表示數目多少的數詞叫基數詞;表示順序的數詞叫序數詞。下面就是小編給大家帶來的關於數次的英語語法，希望能幫助到大家!
基數詞
1.基數詞的構成
***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 先說“幾十”，再說“幾”，中間加連字元。
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先說“幾百”，再加and,再加末兩位數或末位數;
586→five hundred and eighty-six,803→eight hundred and three
***4***l,000以上，先從右往左數，每三位數加一個“，”，第一個“，”前為thousand.第二個“，”前為
million,第三個“，”前為billion***美式***或thousand ,million***英式***，然後一節一節地表示。
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.基數詞的用法
***1***作主語
eg.Four Of them come from Paris.
***2***作賓語
eg.一 How many books would you like?
一I would like two.
***3***作表語
eg.Seven minus two is five.
***4***作定語
eg.There are three people in my family?
***5***作同位語
eg. You two will go swimming with us.
***6***表具體數字時，hundred, thousand ,million用單數。
eg. There are six hundred students in our grade.
***7***表不確定的數字時，數詞用複數。若帶名詞，再加of。 hundreds of***數百，成百上千的***，thousands of***數幹，成千上萬的***，millions of***數百萬***two thousand ***兩千***
Thousands and thousands of people have visited the city.成千上萬的人蔘觀了這座城市。
***8***在一些表示“一排”或“一組”的詞組裡;
eg,They arrived in two sand threes.他們三三兩兩地來了。
***9***表示“…十”的數詞的複數可以表示人的歲數或年代。
eg. He is in his early thirties.他有三十來歲***31—34歲***：
This took place in the 1930s.這事發生在二十世紀三十年代;
***10***表示時刻
鐘點表達法。
順讀法***鐘點+分鐘*** 如：4:30 four thirty 4:45 four forty-five 4:15 four fifteen 倒讀法***分鐘+to/past+鐘點***
如：4:30 half past four
4:15 fifteen past four/a quarter past four 4:45 fifteen to five/a quarter to five
eg.I watch CCTV News at seven o’clock every evening.
***11***表示百分數
百分數的表達方式是：基數詞+ percent***單數形式***+of+名詞。如：
Thirty percent of the students in my class are from cities. 我班30%的學生來自城市。
About 61 percent of the surface is covered by water. 大約61%的表面被水覆蓋著。
***12***小數的讀法：小數點讀作"point"，小數後各位數要分別讀， 小數點前的數若為"0"可略去不讀。
Examples： 2.468 讀作：two point four six eight
II 序數詞
1.序數詞的構成
***1***一般在基數詞後加th
eg.four→fourth,thirteen→thirteenth
***2***不規則變化
one→first, two→second, three→third, five→fifth,eight→eighth,
nine→ninth,twelve——twelfth
***3***以y結尾的十位整數，變y為ie再加th
twenty→twentieth, forty→fortieth, ninety→ninetieth
***4***從二十一後的“幾十幾”直至“幾百幾十幾”或“幾千幾百幾十幾”只將個位的基數詞變為序數詞。
twenty-first,two hundred and forty-fifth
2.序數詞的用法
***1***序數詞作定語時，一般要與定冠詞或物主代詞連用。
eg.Tom is their second son.
He is the first one to come here.
***2***序數詞有時可與不定冠詞連用，表示數量上“又—”，“再一”
eg： He tried a second time.他又試了—次。
Shall l ask him a third time?還要我再問他—次嗎?我已問了他兩次***
***3***序數詞的縮寫形式為：阿拉伯數字加上這個詞的末尾兩個字母。
1st 2nd,3rd,4th,20th,21st,22nd,23rd
***4***表示年、月、日時，年用基數詞，日用序數詞。
2005年8月15日：***英***15,8,2005=15th,August,2005;***美***8,15,2005=August 15th,2005
III基數詞和序數詞都可以用來給數字編號
The first lesson=Lesson Two***第二課***
第305房間：Room three o***零***five
長安街76號：seventy-six Changan Street
電話號碼：204-2244：telephone number two o***零*** four two two***double two four four
十一路公共汽車：Bus***No.*** eleven
IV分數詞的表達
分子用基數詞，分母用序數詞，分子大於1時，分母加s
eg.1/3-one third;2/5-two fifths
V數學運算的表達
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.
VI倍數表示法
a. 主語+謂語+倍數***或分數***+ as + adj. + as
I have three times as many as you. 我有你三倍那麼多。
b. 主語+謂語+倍數***分數***+ the size ***amount，length…*** of…
The earth is 49 times the size of the moon. 地球是月球的49倍。
c. 主語+謂語+倍數***分數***+ 形容詞***副詞***比較級+ than…
The grain output is 8 percent higher this year than that of last year.
今年比去年糧食產量增加8%。
d. 還可以用by+倍數，表示增加多少倍
The production of grain has been increased by four times this year.
今年糧食產量增加了4倍。
0.157 讀作：***zero***point one five seven