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课题数词课时2学生授课老师教学目标数词的用法重点难点序数词-、数词.基数词11—911—19整十几十几one eleventen—two twelvetwenty twenty-one threethirteen thirtythirty-three fourfourteen fortyforty-four fivefifteen fiftyfifty-five sixsixteen sixtysixty-six sevenseventeen seventyseventy-seven eighteighteen eightyeighty-eight ninenineteen ninetyninety-nine▲基数词的读法1在读三位数或三位数以上的基数词时,需在十位数之前若十位数是“0”,在个位前加连词and304-three hundredand four1,342-one thousandthree hundredand forty-two2阿拉伯数字每三位数就需用一个逗号隔开,从后往前数;所用的英语单词为thousand,million,billion,英语中没有“万”和“亿”,在表示“万”和“亿”时要按十进位法来推算1万可用10千来表示,即10,000100,000,000可写成a hundredmillion
2.序数词1第至第十第十一至第一十第一十一至第二十第整十至第一百first eleventhtwenty-first—second twelfthtwenty-second—third thirteenthtwenty-third—fourth fourteenthtwenty-fourth fortiethfifth fifteentwenty-fifth fiftiethsixth sixteenthtwenty-sixth sixtiethseventh seventeenthtwenty-seventh seventietheighth eighteenthtwenty-eighth eightiethninth nineteenthtwenty-ninth ninetiethtenth twentieththirtieth hundredth▲助记歌基变序,有规律,末尾加上th;一二三特殊记,词尾分别t,d,d;八加h,九去e,ve要用f替;以y结尾变ie,后跟th莫忘记;若想表示几十几,只变个位就可以2序数词的基本用法基本概念基本用法例子Mary sitsin the second row.表示编号It happenedon Octoberthe序数词表示数目的顺序表示日期third,
1985.或事物的位置The fifthlesson svery easy主要用作定语、标语,前to learn.面要加定冠词the
3.数词常见的表达法1年代的表达法in the1930s/l930s2日期表达法年份用基数词,日期用序数词1988年5月1日写作May1st,1988,读作May the first,nineteenth eighty-eight或1,t May,1988,读作thefirstof May,nineteenth eighty-eight3分数的表达法分数在英语中通常是借助基数词和序数词来共同表达的,其中基数词表示分子,序数词表示坟墓当分子大于1时,坟墓要用复数形式one third三分之一two thirds三分之二a/one quarter四分之一three andone fourth三又四分之一4小数的表达法小数用基数词来表示,以小数点为界,小数点左边的数字为一个单位,表示整数,数字合起来读;小数点右边的数字为一个单位,表示小数,数字分开来读;小数点读作point,0读作zero或o;整数部分为零时,可以省略不读
0.4-zero point four/pointfour
10.23-ten pointtwo three5百分数的表达法百分数用基数词+percent表示
0.68%-zero pointsix eightpercent6%-six percent6倍数的表达法表示两倍的用twice,表示三或三以上的倍数用基数词+times Theroom istwice aslarge asthat one.This treeis threetimes astall asthat one.★易混易错
1.数词和冠词的关系
①序数词前要加定冠词the;但基数词前不加冠词
②a/an+序数词,表示“又一,再一”
③ofthe+基数词,表示范围
④序数词前已有指示代词、物主代词或every时,不用定冠词
⑤在一些由序数词构成的固定词组中不用定冠词
2.数词的读法从后往前数,每三位加一个逗号;第一个逗号前读hundred,第二个逗号前读million,第三个逗号前读billion年份的读法是两位两位地读
3.基数词与单数名词用连字符链接构成符合形容词,作名词的定语
4.几个半的读法基数词+and+a half+名词复数=基数词+名词(单数/复数)+and+a halftwo and a halfhours=two hoursandahalf
5.与another,more连用时;表示在已有的基础上再增加一定的数量,其结构为“another+基数词”或“基数词+more”My fatherwill stayin Beijingfor anothertwo weeks.I needtwo morechairs.
6.表示编号时的易混之处
①用基数词来表示编号时,应放在名词之后,且不需要任何冠词(但通常名词第一个字母要大写)
②用序数词来表示编号时,应放在名词之前,且前面需要加定冠词the习题
(一)
1.Yesterday peoplecame tothe townto watchthe carrace.A.hundreds B.hundred C.hundreds ofD.hundred of
2.Tree PlantingDay isin March,the monthof theyear.A.three B.third C.five D.fifth
3.-Mum,the beautifulcard Imade lastnight isjust foryour birthday.-Oh,thank you,my dear!A.forty B.the fortiethC.fortieth D,fourth
4.May isthe monthof ayear.A.fifty B.fifteen C.fifth D.five
5.-1heard yourfriend isvisiting Sanyaagain.Is itthesecondtime forhim-Yes,and hewill comefor timenext spring.A.a thirdB.a second C.a third
6.A girllooked afterher disabledfather.A.three-year-old B.three-years-old C.three yearold
7.Mothers Dayis on the Sundayin Mayevery year.A.two B.secondC.six D.sixth
8.-Excuse me,sir.Heres apackage forLin Tao.Which roomdoes helives inA.308Room B.Room308C.The Room308D.The308Room
9.-How faraway isthe smallvillage fromMoscow-its aboutkilometer.A.seven hundredand twentytwo B.seven hundredand twenty-two C.seven hundredsand twenty-two D.seven hundredsand twenty-two
10.There aresixty studentsin ourclass.And ofus areboys.-Wow!Forty girlsin yourclass.A.one fourthB.one thirdC.three quartersD.two thirds
11.Would youplease passme bookontheright A.the thirdB.the threeC.three D.third。