中考英语 二轮复习语法突破课件：专题四数词

专题四数词考点一基数词1.构成数字基数词形式例词0～12各自独立zero0;one1;nine9;twelve1213～193～9+重读teen结尾特殊:thirteen13;fifteen15;eighteen18一般:fourteen14;sixteen1620～90整十位数以ty结尾twenty20;thirty30;forty40;fifty50;sixty60;seventy70;eighty80;ninety90两位数(几十几)十位数-个位数twenty-one21;thirty-five35;三位数(几百几)...hundredand+两位数sevenhundredandeighty-five785;twohundredandten210多位数从右向左数起,每隔三位数加一个逗号,依次为thousand(千),million(百万),billion(十亿),逗号中间三位数76,832,154,968seventy-sixbillioneighthundredandthirty-twomilliononehundredandfifty-fourthousandninehundredandsixty-eight2.用法(1)表示数量的多少。如:fortystudents(2)表示年份或年代。如:2017读作twothousandandseventeen;inthe1990s在20世纪90年代(3)表示时刻。如:2:40读作twoforty或twentytothree3:14读作fourteenpastthree(4)表示顺序或编号:名词单数+基数词,名词的第一个字母要大写。如:Room203(5)“数词-单数名词-形容词”构成复合形容词,作定语,修饰名词。如:aneight-year-oldboy(6)“基数词+计量单位+形容词(长、宽、高、深等)”表示计量。如:10kilometerslong(7)表示年龄:inone’s+整十数的复数形式在某人几十多岁thirtyyearsold=attheageofthirty在30岁inherthirties在她三十多岁时(8)倍数的表达:一倍用once,两倍用twice,三倍及以上用“基数词+times”表示:threetimes三倍对点训练()1.(2023白银)—What’sthirtyandten? —It’s

.

A.forty B.fifty C.seventy D.eighty()2.Inthe

Chineseanimalsigns,theTigeristhe

inorder.

A.twelve;three B.twelve;third C.twelfth;three D.twelfth;thirdAB考点二序数词1.构成(1)序数词1～19除了第一(first)、第二(second)、第三(third)是独立单词外,其余一般是由基数词后加-th构成。但其中第五(fifth)、第八(eighth)、第九(ninth)、第十二(twelfth)的拼写要特别注意。(2)表示“第几十”的序数词是先将对应的基数词词尾中的y变为ie,再加-th。(3)表示“第(几千几百)几十几”的序数词,只须将对应的基数词个位数变成序数词即可,十位、百位、千位数保持不变。(4)缩写:对应的阿拉伯数字+词尾最后两个字母[巧记]基变序,有规律,-th从四起;一二三,特殊记,八去t,九去e,ve要用f替;y结尾变-ie,后加-th莫忘记;若要表示几十几,只变个位就可以。2.用法(1)表示顺序:序数词表示顺序时,其前要加定冠词the,后接单数名词。thefirstwomanastronaut第一位女宇航员(2)用于最高级前,表示“第几最……的”。thesecondlongestriver第二长河(3)用“a+序数词+单数名词”表示数量上再增加“一”。如:Ifacouplehaveonechild,theycanhaveasecondonenow.如果一对夫妇有了一个孩子,现在他们可以再生一个孩子。对点训练()1.(2023齐齐哈尔)—Thiswillbemy

visittotheSun Island.I’mreallyexcited.

—Really?Ican’tbelieveit.You’vebeeninHarbinfor ayear. A.first B.second C.third D.fourthA()2.(2023凉山州)Mygrandmatoldmethenumber“9”stands for“Longlasting”.SoIchosethe

floorto liveon.

A.nine B.eighth C.ninth D.nineteenthC考点三分数/百分数1.分数的表达法分子用基数词,分母用序数词。分子大于1时,分母要加-s。如:onesecond或a/onehalf二分之一twothirds三分之二2.用法“分数/百分数+of+名词/代词”作主语时,谓语动词形式与名词/代词

保持一致。*Onethirdofthegirlsaregoodatsinginginourclass.

我们班三分之一的女生擅长唱歌。对点训练1.TomwasangrybecauseJerryatetwo

ofhisnineapplessecretly.Nowhehadonlythreeleft.

2.Hereisasurveyabouthowtobeagoodlearneramong400students.Accordingtotheformbelow,

studentshavechosen“Learningfrommistakes”astheirkeywords.

thirds160KeywordsMakingplansTakingnotesAskingquestionsLearningfrommistakesPercentage(百分比)20%10%30%?()3.(2023绥化)About

ofmyclassmateshelptheir parentsdohouseworkonweekends.

A.twofifths B.secondfive C.secondfifths D.twofiveA考点四确数与约数1.hundred,thousand,million等词与具体的数字连用时表示确数,用单

数形式。*Shehassoldmorethantwothousandbooks.她已经卖出了两千多本书。2.hundred,thousand,million等词不与具体的数字连用时表示约数,用

其复数形式,后加of。*Therearethousandsofbooksinourschoollibrary.

在我们学校的图书馆里有成千上万本书。对点训练()1.Inourcitymuseum,therearemanyoldthingsfromtwo

yearsagoonshow.

A.thousands B.thousandsof C.thousand D.thousandofC()2.Thereare

paintingsonexhibition(展览).

. workswerecreatedbyyoungartists.

A.twohundred;Twohundreds B.twohundreds;Hundredsof C.hundredsof;Twohundred D.hundredof;TwohundredC单项选择()1.(2024东营)Iam

childinmyfamily.Ihaveanelder brotherandayoungersister.

A.one B.thefirst C.thesecond D.thethirdC

()2.(2022东营)Dentist:Madam,twenty-fivedollarsforpulling yourson’stooth,please. Madam:Twenty-fivedollars!Butyoutoldmefivedollars eachpatient. Dentist:Yes.Butyoursoncriedsoloud.Hescaredaway(吓

跑)

otherpatients.

A.four B.five C.twenty D.twenty-fiveA()3.(2024白银)Juneisthe

monthofayear.

A.fifth B.sixth C.seventh D.eighth()4.(2024绥化改编)An

boy,LiWen,workshardandgets goodgradesinhisfinalexam.

A.eighteen-year-olds B.eighteen-year-old C.eighteenyearsold D.eighteen-years-oldBB()5.(2024龙东改编)Two

dollarsisenoughtobuythe bike,butIcan’tafford

it.

A.hundreds;tobuy B.hundreds;buy C.hundred;tobuy D.hundred;buy()6.(2024牡丹江改编)Thereare

solarterms(节气)ina year.Lichunisthefirstone.

A.twenty-four B.twenty-fourth C.thetwenty-fourth D.atwenty-fourCA()7.(2023龙东改编)Nowadays,

peoplelikethenewphones better,andabout

ofthemareadults.

A.thenumberof;fourfifths B.anumberof;fourfift