初中英語語法—數(shù)詞ppt課件.ppt
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1、初中英語語法,稻田一中 李培軍,數(shù)詞,數(shù) 詞,數(shù)詞就是表示事物的數(shù)量和順序的詞,分基數(shù)詞和序數(shù)詞兩種。,一、基數(shù)詞:表示數(shù)目的詞稱為基數(shù)詞。,1.基數(shù)詞的形式: A從110:one,two,three,four,five,six,seven,eight,nine,tenB從 1119:eleven,twelve, thirteen, fourteen, fifteen, sixteen,seventeen,eighteen, nineteen注意:這里除 eleven,twelve,thirteen,fifteen,eighteen為特殊形式外,fourteen,sixteen,sevente
2、en,nineteen都是由其個(gè)位數(shù)形式后添加后綴-teen構(gòu)成。,C從 2199 : 整數(shù)幾十中除twenty,thirty, forty,fifty,eighty為特殊形式外,sixty,seventy,ninety都是其個(gè)位數(shù)形式后添加后綴-ty構(gòu)成。表示幾十幾時(shí),在幾十和個(gè)位基數(shù)詞形式之間添加連字符“-”。例如:21 twenty-one 76 seventy-six注意: forty的拼寫。D百位數(shù):基數(shù)詞101999,先說“幾百”,再加“and”,再加末兩位數(shù)。 101 a hundred and one 320 three hundred and twenty 648 six h
3、undred and forty-eight注意:在幾十和個(gè)位基數(shù)詞形式之間添加連字符“-”。,E千位數(shù)以上:1000以上數(shù)目,從右向左每三位用“,” 分開,分別讀為thousand , million, billion 。例如:5, 237, 166, 2 34 讀作:,2,648 16,250,064,billion,million,thousand,hundred,and,five billion,two hundred and thirty-seven million,one hundred and sixty-six thousand,two hundred and thirty-f
4、our,two thousand, six hundred and forty-eight,sixteen million, two hundred and fifty thousand, sixty-four,2基數(shù)詞用法:,、表示具體數(shù)目,hundred, thousand, million不用復(fù)數(shù)。 表示不確定數(shù)目,用復(fù)數(shù)。即hundreds of(數(shù)百), thousands of(數(shù)千), millions of(數(shù)百萬)+ 名詞復(fù)數(shù),可以用many/several修飾,但不能與具體數(shù)目連用。 1) Our country has a population of 1,300 mill
5、ion people. 2) There are three thousand students in our school. 3) After the war, thousands of people became homeless. 4) Several / Many thousands of trees must be planted every year.注意:several thousands of trees = several thousand trees,即學(xué)即用:Many_ trees must be planted every year. A. thousands of B
6、. million of C. hundred of D. hundreds,four thousand of the students(學(xué)生中的四千人)four thousand students(四千學(xué)生),注意,、 “幾十”的復(fù)數(shù)形式可以表示: 幾十多歲 - “in + ones +整十的數(shù)詞復(fù)數(shù)” 年 代 -“ in + the +整十的數(shù)詞復(fù)數(shù)”My parents are in their forties. It was in the 1960s/ in the 1960sIn the nineties, most people go to work by bike.,、基數(shù)詞表示
7、編碼:Room 207 207房 Class 2,Grade 9 九年級二班 Page Five = the fifth page 第五頁 Lesson One = the first lesson 第一課Bus No.3 = the No.3 bus 3號汽車No. 1 Middle School 第一中學(xué),注意:用此種方法表示時(shí),首字母需大寫,不加冠詞。,twenties,thirties,forties,fifties,sixties,seventies, eighties,nineties,即學(xué)即用:1.In his _(fifty), he started to learn Engl
8、ish.2.The city changed a lot _. A. in 1980s B. in the 1980s C. in the 19803. He graduated in _ of _ century. A. the sixtieth; twenty B. sixty; the twentieth C. the sixties; the twentieth4. He got the prize _. A. in his fifties B. in fifties C. in his fifty5.The winner is _. He is an _ boy . A. eight
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