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1、小学英语语法数词专项SevenLessonOne——基数词——序数词一.基数词1)1-12,独立成词。onetwothreefourfivesixseveneightnineteneleventwelve2)13--19,由3-9+teen构成。14–fourteen16--sixteen17--seventeen19—nineteen特殊拼写:13–thirteen15--fifteen18—eighteen3)20-90整十位数,以-ty结尾。20—twenty30---thirty40—forty50—fifty80---eighty60---six
2、ty70---seventy90—ninety5)101—999,三位数,百位与十位/个位之间加and101onehundredandone840eighthundredandforty693sixhundredandninety-three4)21-99,两位数,十位与个位之间有“-”21twenty—one55fifty—five99ninety—nine二.序数词3)20-90,y变成ie+th,如twentieth1)1-3,first,second,third2)4-19,相应基数词+th,特殊拼写:fifth,eighth,ninth,twel
3、fth4)21-99,只把个位的基数词变成序数词如twenty-first5)序数词缩写----数字+最后两字母如1st,2nd,3rd,4th…序数词构成规律基变序,有规律,一、二、三,特殊记,面目全非要注意,加th从4起,八少“t”,九去“e”,“ve”要用“f”替,(five,twelve)见“y”变成“i”和“e”,词尾再加“th”,(twenty,thirty,……ninety)若是遇到几十几,只变个位就可以。序数词缩写记清楚,数字后跟两字母。8th写出下列数词相对应的基数词或序数词1)one.2)two.3)three.4)nine.5)twe
4、lve.6)twenty.7)eighty-eight.8)sixty-two.9)fifty-four.10)fourhundred.11)sixth.12)thirteenth.13)eleventh.14)hundredth.15)ninety-sixth.16)onehundredandthird.firstsecondthirdninthtwelfthtwentietheighty-eighthsixty-secondfifty-fourthfourhundredthsixthirteenelevenhundredninety-sixonehun
5、dredandthreeLessonTwo——数词的运用三:数词的应用1.表示倍数一倍once二倍double/twice三倍和三倍以上基数词+timeseg:Twicethreeissix.三的两倍是六。fivetimesthreeisfifteen.三的五倍是十五。2.表示分数分子基数词1/3One-thirds分母序数词1)分子大于1时,分母序数词的复数形式(加-s)eg:2/3two-thirds3/4three-fourths2)有些分数可用half和quarters表示:eg:1/2a(one)half1/4a(one)quarter3/4th
6、reequarters半年halfayear半小时halfanhour一年半oneandahalfyears(oneyearandahalf)3.表示小数小数点以前的数用基数词读出小数点读作point小数点以后的数用基数词逐个读出eg:0.7zeropointseven326.1threehundredandtwenty-sixpointone3.1415926……threepointonefouronefiveninetwosix……4.表示百分数百分数用基数词读出百分号读作percenteg:0.7%zeropointsevenpercent26%tw
7、enty-sixpercentFortypercentoftheapplesonthetreearegreen.那棵树上百分之四十的苹果都是绿的。5.表示四则运算加+and或plus减-minus乘×times除÷dividedby等于=equals或is或makes3+4=7threeplusfourequalsseven.4-3=1fourminusthreeequalsone.4×3=12fourtimesthreeistwelve.12÷4=3twelvedividedbythreemakesfour5.表示四则运算6.表示编号The+序数词+名词
8、前面一定要加the名词+基数词首个字母要大写,基数词也可用阿拉伯数