初中英語(yǔ)語(yǔ)法總結(jié)-數(shù)詞

初中英語(yǔ)語(yǔ)法大全：數(shù)詞詞叫基數(shù)詞；表示順序的數(shù)詞叫序數(shù)詞。I基數(shù)詞1.基數(shù)詞的構(gòu)成（1）1-20one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen,twenty）923→twenty-three,34→thirty-four,45→forty—five,56→fifty-six,67→sixty-seven,78→seventy-eight,89→eighty-nine,91→ninety-one）9and再加末兩位數(shù)或末位數(shù)；586→fivehundredandhundredandthree（4）l,000以上,先從右往左數(shù)，每三位數(shù)加一個(gè)“,”,第一個(gè)“,”前為thousand.第二個(gè)“,”前為million,第三個(gè)“,billion（美式）thousand,million（英式）,然后一節(jié)一節(jié)地表示。1,001→onethousandandone9,785→ninethousand,sevenhundredandeighty-five18,423→eighteenthousand,fourhundredandtwenty-three6,260,309→sixmilliontwohundredandsixtythousandthreehundredandnine750,000,000,000→sevenhundredandfifty,billion（美式）sevenhundredandfiftythousandmillion（英式）2.基數(shù)詞的用法作主語(yǔ)eg.FourOfthemcomefromParis.作賓語(yǔ)eg.一Howmanybookswouldyou一Iwouldliketwo.作表語(yǔ)eg.Sevenminustwoisfive.作定語(yǔ)eg.Therearethreepeopleinmyfamily?作同位語(yǔ)eg.Youtwowillgoswimmingwithus.,hundred,thousand,millioneg.Therearesixhundredstudentsinourgrade.of。hundredsof（的）,thousandsof（數(shù)干,成千上萬(wàn)的）,millionsof（數(shù)百萬(wàn)）twothousand(兩千)Thousandsandthousandsofpeoplehavevisitedthe市。在一些表示“一排”或“一組”的詞組里；eg,Theyarrivedintwosandthrees.他們?nèi)齼蓛傻貋?lái)了。表示“?十”的數(shù)詞的復(fù)數(shù)可以表示人的歲數(shù)或年代。

千上萬(wàn)的人參觀了這座城eg.Heisinhisearlythirties.他有三十來(lái)歲（31—34歲）：Thistookplaceinthe1930s.這事發(fā)生在二十世紀(jì)三十年代；鐘點(diǎn)表達(dá)法。順讀(鐘點(diǎn)＋分) 如：4:30fourthirty4:45fourforty-five4:15fifteen 倒讀分鐘＋to／past＋鐘)如：4:30halfpastfour4:15fifteenpastfour／aquarterpastfour4:45fifteentofive／aquartertoeg.IwatchCCTVNewsatseveneveryevening.表示百分?jǐn)?shù)百分?jǐn)?shù)的表達(dá)方式是：基數(shù)詞+percent（單數(shù)形式）+of+名詞。如：Thirtypercentofthestudentsinmyclassarefromcities. 30自城市。About61percentofthesurfaceiscoveredbywater.大約61%的表面被水覆蓋著。"point可略去不讀。Examples：2.468讀作：twopointfoursixeight0.157讀作：（zero）pointonefivesevenIIII序數(shù)詞1.序數(shù)詞的構(gòu)成一般在基數(shù)詞后加th不規(guī)則變化one→first,two→second,three→third,five→fifth,eight→eighth,nine→ninth,twelve——twelfth以y結(jié)尾的十位整數(shù)，變yiethtwenty→twentieth,,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(gè)位的基數(shù)詞變?yōu)樾驍?shù)詞。twenty-first,twohundredandforty-fifth2.twenty-first,twohundredandforty-fifth2.序數(shù)詞的用法序數(shù)詞作定語(yǔ)時(shí)，一般要與定冠詞或物主代詞連用。eg.Tomistheirsecondson.Heisthefirstonetocomehere.eg：Hetriedasecondtime.他又試了—次。Shalllaskhimathirdtime？還要我再問(wèn)他—次嗎？我已問(wèn)了他兩次）序數(shù)詞的縮寫形式為：阿拉伯?dāng)?shù)字加上這個(gè)詞的末尾兩個(gè)字母。1st2nd,3rd,4th,20th,21st,22nd,23rd表示年、月、日時(shí)，年用基數(shù)詞，日用序數(shù)詞。5年8月5（英（美tIII基數(shù)詞和序數(shù)詞都可以用來(lái)給數(shù)字編號(hào)Thefirstlesson=LessonTwo（第二課）第305房間：Roomthreeo（零）five長(zhǎng)安街76號(hào)：seventy-sixChanganStreet電話號(hào)碼：204-2244：telephonenumbertwoo（零）fourtwotwo（doubletwofourfourelevenIV分?jǐn)?shù)詞的表達(dá)分子用基數(shù)詞，分母用序數(shù)詞，分子大于1時(shí)，分母加eg.1／3-onethird；2／5-twofifths數(shù)學(xué)運(yùn)算的表達(dá)eg.3+5=8Threeplus／andfiveiseight.9-2=7Nineminustwoisseven.6x5=30Fivetimessixisthirty／sixunutilizedfiveisthirty.8÷2=4Eightdividedbytwoisfour.倍數(shù)表示法+倍數(shù)（或分?jǐn)?shù)as+adj.+asIhavethreetimesasmanyasyou. 我有你三倍那么多。主+謂倍數(shù)（分?jǐn)?shù)thesizeTheearthis49timesthesizeofthemoon. 地球是月球的49倍+倍數(shù)（分?jǐn)?shù)+形容詞（副詞）th