英语九年级【知识精讲】10.数词(1)基数词 课件
展开(1) 1-12的基数词是独立的单词,有其各自的形式:ne, tw, three, fur, five, six, seven, eight, nine, ten, eleven, twelve (2) 13-19的基数词以-teen结尾,单词中的两个音节次重读+重读。一般都是在相应的表示“几”的基数词后加-teen:furteen,sixteen, seventeen,nineteen等,(thirteen, fifteen, eighteen的拼写较特殊) (3)20-90中表示整十位数的词,一般都是在相应的表示“几”的基数词后加-ty,单词的第一个音节重读。sixty, seventy, ninety,(twenty, thirty, frty, fifty, eighty的拼写较特殊)
(1) 两位数的写法:在十位数与个位数之间加连字符 “-”。 写法:twenty-eight, ninety-six。 读法:先读十位的“几十”,再读个位的“几”。 (2) 三位数的读法,在百位和十位 (若无十位,则和个位)之间用and连接(美式英语可不用and)。148 ne hundred(and)frty-eight,406 fur hundred and six。
(3)大数字的读法:从后向前数,每三位数加一个逗号。第一个逗号前的数字后加thusand,第二个逗号前的数字后加millin,第三个逗号前的数字后加billin。1,987:ne thusand, nine hundred and eighty-seven5,984, 034:five millin, nine hundred (and) eighty- fur thusand, (and) thirty-fur 24,500,379,168 twenty-fur billin, five hundred millin, three hundred(and)seventy-nine thusand, ne hundred(and)sixty- eight
(1)表示数量和数目用基数词:There is ne apple and tw ranges n the table.There are seven hundred students in ur schl.
(2) 表示时刻:英语中的时刻是用基数词来表示的①直接法。6:30 six thirty 7:52 seven fifty-tw ②间接法。 5:25 twenty-five past five 10:43 seventeen t eleven ③特殊点:表示“整点”“半点”和“一刻钟”。6:00 six(‟clck) 10:30 half past ten 4:45 a quarter t five 7:15 a quarter past seven 例1:What time is it? —It‟s twenty t three.
(3) 表示年龄: 岁数+year(s) ld(可以省略) in ne’s + 整十的复数 He is ten years ld. =He is ten . 他十岁了。I culd swim when I was seven years ld.I culd swim at the age f seven.He pened a cmpany in his frties.
(4) 表示顺序、编号 一般置于名词后,N.放于名词前。第二单元:Unit 2 第20页: Page20 106房间:Rm 1062路汽车: the N. 2 bus 第四中学:N. 4 Middle Schl Please turn t Page 20 and we will study Unit 2
(6)用于计算:计算做主语时,谓语动词用单数。 例1: —What’s ne plus tw? —It’s three. 例2: Seven times seven is frty-nine.
(5) 电话号码用基数词,可单个读,重复的数字可用duble。3866988: three eight six six (duble six)nine eight eight(duble eight)。
(7)表示倍(次)数 :一倍(次) nce,两倍(次) twice,两倍(次)以上用“基数词+times”表示。 I have been t Beijing three times. My weight is three times heavier than yurs.
(8)表示年份和年代: 1980 可写作:nineteen eighty 2004 可写作:tw thusand and fur在19世纪80年代:in 1880s in 1880’s(9)分数中的分子用到基数词:四分之三:three furths 三分之一:ne third
基数词在句子中的作用:(1)作主语: It is said thirteen is an unlucky number. Three f them jined the schl team.(2)作表语:The by is ten. Five times five is twenty-five.(3)做宾语:The shp assistant wears a nine n this unifrm. It is wrth fur hundred dllars.(4)作定语:I have invited ten friends t my birthday party.(5)做同位语:Are yu tw reading? They three jined the schl team.
基数词使用的注意事项:1. 几百,几千,几百万的表达方式:数字+单数 five hundred ten thusand seven millin2. 数字、算式或含有数字的路程、距离作主语,谓语动词用单数。Five hurs is nt a lng time. Five times five is twenty-five.3. 数字可以用于合成形容词中。She is five years ld. She is a five-year-ld by.She tk a five-minute walk.
单项选择Last year, I visited a chemical factry in Baise, there are abut _____ wrkers in it.A.six thusandsB.six thusandC.six thusands fD.six thusand f
单项选择Abut ________ f the wrkers in the factry were brn in the ________.A.tw-thirds, 1970B.tw-thirds, 1970sC.tw-third,1970D.tw-third, 1970s
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