基数词和序数词完整版课件.ppt
,Nice to meet you!,Welcome,one little,two little,three little indians.four little,five little,six little indians.seven little,eight little,nine little indians,ten little indian boys.ten little,nine little,eight little indians.seven little,six little,five little indians.four little,three little,two little indians,one little indian boy.,Ten Little Indian Boys,数词,Numbers,数词,基数词:,表示数量的词,序数词:,表示顺序的词,数词,基数词的构成,0-12是独立的单词,zero,one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,13-19带有后缀teen,20-90各整十位数带有后缀 ty,21-99十位和个位数之间要用连字符号“-”,101-999,thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen,twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety,如:21,seven hundred and eight,99,twenty-one,ninety-nine,构成特点,单 词,three hundred and fifty-nine,一般基数词变为序数词,four,fourth,seventh,sixth,six,seven,直接在词尾加 th,特殊的基数词变序数词,first,second,third,eighth,ninth,fifth,twentieth,fortieth,ninetieth,twenty-first,forty-fourth,one hundred and first,twelfth,one hundred and one,first,second,third,eighth,ninth,fifth,twentieth,fortieth,ninetieth,twenty-first,forty-fourth,one hundred and third,twelfth,one hundred and three,让我们来找找其中的规律,巧记基数词变序数词,一二三，要牢记八去t，九去e，f代 vety结尾很容易，改y为i加上eth结尾是标记，数大数小没关系末尾数字起变化，得心应手不费力,1、表示页数；号码；公共汽车路线；学校；医院；年级；班级；年份等,例如：,page 1 读作page one,Class Two,Grade Seven,数词的基本用法,nineteen ninety-eight,2、表达时刻：,数词的基本用法,例如：,at five(oclock)；,at four ten 或 at ten past four,at six fifty 或 at ten to seven,（整点）,（分钟数小于30）,（分钟数大于30）,3、分数的表达法,分数由基数词和序数词合成：分母用序数词，分子用基数词；分子在前，分母在后。当分子大于1时，分母用复数形式。,one third,two thirds,one fifth,three fifths,母序，子基；子前，母后。,巧记分数表达法：,数词的基本用法,4、hundred、thousand、million 的用法,如果表示具体的几百、几千、几百万时，三个单词后都不用复数形式；如果用了复数形式，要跟of连用，构成固定的搭配。hundreds of 成百上千的 thousands of 成千上万的 millions of 数以百万计的,数词的基本用法,数词的基本用法,5、由基数词构成的复合词，名词 不用复数形式,而且单词之间必须用连词符号“-”连接。,一个五岁的男孩：,一百一十米跨栏：,例如：,a five-year-old boy,110-metre hurdles（跨栏）,要小心哦！,1、-What class are you in,Mike?-Im in _.A Grade Three,Class Two B Class Two,Grade ThreeC class two,grade three D grade three,class two 2、_Iraqi（伊拉克的）any thousand of D Thousands,小试牛刀,B,B,A,3.Liu Xiang,21,is an Olym.A 110-metre B 110-metres C 110 metre4.We have only _(first)earth.We must take good care of it.5.-Where will we have our chemistry lesson this afternoon?-In the chemistry lab on the_(three)floor.,小试牛刀,one,third,Thank you!,考点练习,is the _ month of the year.A.twelve B.twelveth C.twelfth of the newsily,They live on the _ floor in a tall building.A.six,eighteenth B.six,eighteenC.sixth,eighteen D.sixth,eighteenth,C,B,A,of the two rulers are broken.I want to buy a _ one.A.three B.forth C.third D./5._ etown（家乡）during the war.(战争)A.Three thousands B.Thousand of C.Seven thousands D.Thousands of,考点练习,C,D,
