寒假英語學(xué)習(xí)——不可忽略的數(shù)詞
寒假英語學(xué)習(xí)不可忽略的數(shù)詞
英語中的數(shù)詞包括基數(shù)詞和序數(shù)詞兩大類,它們的用法非常復(fù)雜,為了便于同學(xué)們系統(tǒng)地復(fù)習(xí)數(shù)詞,現(xiàn)就初中階段數(shù)詞的主要內(nèi)容作以下歸納。北京第一七一中學(xué) 邊秋穎
一、基本構(gòu)成
(一)基數(shù)詞從1數(shù)到N
1.112的基數(shù)詞是獨立的單詞,即: one,two,three,four,five,six,seven,eight, nine,ten,eleven,twelve。
2.1319的基數(shù)詞以-teen結(jié)尾。如: fourteen,seventeen等,但13,15,18較特殊, 13thirteen 15fifteen 18eighteen。
3.2090的整十位均以-ty結(jié)尾。如: sixty,ninety,但20,30,40,50,80較特殊, 20twenty, 30thirty, 40forty ,50fifty ,80eighty。
4.十位數(shù)與個位數(shù)之間要加連字符號-,如:28twenty-eight,96ninety-six。
5.百位和十位(若無十位則和個位)之間加and,如:148one hundred and forty-eight ,406four hundred and six。
6.hundred(百),thousand(千),million(百萬),billion(十億)等前面即使有具體的數(shù)詞,也不能在它們的后面加s。如:600six hundred,8百萬eight million。
7.1000以上的數(shù)字,從后往前數(shù)每三位加一個逗號,第一個逗號前為千(thousand),第二個逗號前為百萬(million),第三個逗號前為billion(十億)。英語中無萬這個詞,我們可以用幾十個千(thousand)表示幾萬,幾百個千(thousand)表示幾十萬。如:2,510=two thousand five hundred and ten;84,296=eighty-four thousand two hundred and ninety-six;274,350=two hundred and seventy-four thousand three hundred and fifty。
8.hundred,thousand,million用復(fù)數(shù)形式修飾名詞時要用of+復(fù)數(shù)名詞,如:數(shù)以百計的年輕人hundreds of young people;數(shù)以千計的書thousands of books。注意:hundreds of /thousands of/millions of +復(fù)數(shù)名詞,其前面不能加具體的數(shù)詞,但可加several或 many。
Hundreds of new buildings have sprung up here this year.
Thousands upon thousands of people in South Africa are rising against their oppressors.
Thousands and thousands of people come to visit the city every day.
Millions of dollars have gone into the building of this factory.
(二)序數(shù)詞由基數(shù)詞轉(zhuǎn)變而來,表示這是第N個
1.口訣巧記基數(shù)詞變序數(shù)詞:一、二、三,特殊記,八去t,九去e,ve要用f替,見y變成i和e,詞尾加上th,若是遇到幾十幾,只變個位就可以。第一、第二、第三分別:first,second,third,eighteighth nineninth,fivefifth,twelvetwelfth,twentytwentieth,fortyfortieth,twenty-fivetwenty-fifth。
2其余情況均在基數(shù)詞后加th。如: sixsixth, nineteennineteenth , hundred hundredth, thousandthousandth等。
3.序數(shù)詞有時用縮寫形式:
first----1st, twentysecond-------22th.
寒假英語學(xué)習(xí)不可忽略的數(shù)詞
英語中的數(shù)詞包括基數(shù)詞和序數(shù)詞兩大類,它們的用法非常復(fù)雜,為了便于同學(xué)們系統(tǒng)地復(fù)習(xí)數(shù)詞,現(xiàn)就初中階段數(shù)詞的主要內(nèi)容作以下歸納。北京第一七一中學(xué) 邊秋穎
一、基本構(gòu)成
(一)基數(shù)詞從1數(shù)到N
1.112的基數(shù)詞是獨立的單詞,即: one,two,three,four,five,six,seven,eight, nine,ten,eleven,twelve。
2.1319的基數(shù)詞以-teen結(jié)尾。如: fourteen,seventeen等,但13,15,18較特殊, 13thirteen 15fifteen 18eighteen。
3.2090的整十位均以-ty結(jié)尾。如: sixty,ninety,但20,30,40,50,80較特殊, 20twenty, 30thirty, 40forty ,50fifty ,80eighty。
4.十位數(shù)與個位數(shù)之間要加連字符號-,如:28twenty-eight,96ninety-six。
5.百位和十位(若無十位則和個位)之間加and,如:148one hundred and forty-eight ,406four hundred and six。
6.hundred(百),thousand(千),million(百萬),billion(十億)等前面即使有具體的數(shù)詞,也不能在它們的后面加s。如:600six hundred,8百萬eight million。
7.1000以上的數(shù)字,從后往前數(shù)每三位加一個逗號,第一個逗號前為千(thousand),第二個逗號前為百萬(million),第三個逗號前為billion(十億)。英語中無萬這個詞,我們可以用幾十個千(thousand)表示幾萬,幾百個千(thousand)表示幾十萬。如:2,510=two thousand five hundred and ten;84,296=eighty-four thousand two hundred and ninety-six;274,350=two hundred and seventy-four thousand three hundred and fifty。
8.hundred,thousand,million用復(fù)數(shù)形式修飾名詞時要用of+復(fù)數(shù)名詞,如:數(shù)以百計的年輕人hundreds of young people;數(shù)以千計的書thousands of books。注意:hundreds of /thousands of/millions of +復(fù)數(shù)名詞,其前面不能加具體的數(shù)詞,但可加several或 many。
Hundreds of new buildings have sprung up here this year.
Thousands upon thousands of people in South Africa are rising against their oppressors.
Thousands and thousands of people come to visit the city every day.
Millions of dollars have gone into the building of this factory.
(二)序數(shù)詞由基數(shù)詞轉(zhuǎn)變而來,表示這是第N個
1.口訣巧記基數(shù)詞變序數(shù)詞:一、二、三,特殊記,八去t,九去e,ve要用f替,見y變成i和e,詞尾加上th,若是遇到幾十幾,只變個位就可以。第一、第二、第三分別:first,second,third,eighteighth nineninth,fivefifth,twelvetwelfth,twentytwentieth,fortyfortieth,twenty-fivetwenty-fifth。
2其余情況均在基數(shù)詞后加th。如: sixsixth, nineteennineteenth , hundred hundredth, thousandthousandth等。
3.序數(shù)詞有時用縮寫形式:
first----1st, twentysecond-------22th.