1、精選優質文檔-傾情為你奉上初中英語語法大全：數詞定義：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。I基數詞1.基數詞的構成（1）1-20one,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”，中間加連字符。23twenty-three,34thirty-four,45for

2、tyfive,56fifty-six,67sixty-seven,78seventy-eight,89eighty-nine,91ninety-one（3）101999先說“幾百”，再加and,再加末兩位數或末位數；586five hundred and eighty-six,803eight 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）,然后一節一節地表示。1,001one thousand and

3、 one9,785nine thousand, seven hundred and eighty-five18,423eighteen thousand, four hundred and twenty-three6,260,309six million two hundred and sixty thousand three hundred and nine750,000,000,000seven 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

4、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

5、數字時,數詞用復數。若帶名詞，再加of。 hundreds of（數百,成百上千的）,thousands of（數干,成千上萬的）,millions of（數百萬）two thousand (兩千)Thousands and thousands of people have visited the city.成千上萬的人參觀了這座城市。（8）在一些表示“一排”或“一組”的詞組里；eg,They arrived in two sand threes.他們三三兩兩地來了。（9）表示“十”的數詞的復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

6、（3134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topast鐘點)      如：4:30 half past four 4:15 fifteen past foura quarter past four  4:4

7、5 fifteen to fivea quarter to five eg.I watch CCTV News at seven oclock 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

8、表面被水覆蓋著。（12）小數的讀法：小數點讀作"point"，小數后各位數要分別讀， 小數點前的數若為"0"可略去不讀。  Examples：  2.468 讀作：two point four six eight   0.157 讀作：（zero）point one five sevenII 序數詞1.序數詞的構成（1）一般在基數詞后加theg.fourfourth,thirteenthirteenth（2）不規則變化onefirst, twosecond, threethird, fivefifth,eighteighth

9、,nineninth,twelvetwelfth（3）以y結尾的十位整數，變y為ie再加thtwentytwentieth, fortyfortieth, ninetyninetieth（4）從二十一后的“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-fifth2.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”,

10、“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,2005III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

11、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.） elevenIV分數詞的表達分子用基數詞，分母用序數詞，分子大于1時，分母加seg.13-one third；25-two fifthsV數學運算的表達eg.3+5=8 Three plusand five is eight.9-2=7 Nine minus two is seven.6x5=30 Five t

12、imes 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.我有你三倍那么多。 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+ thanThe grain outp