bec备考前需掌握的基础知识new

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1、1． 数字　　分为基数词和序数词　　Cardinal                        Ordinal　　1one                         1stfirst　　2two                         2ndsecond　　3three                        3rdthird　　4four                         4thfourth　　5five                         5thfifth　　6six                          6thsixth　　

2、7seven                        7thseventh　　8eight                         8theighth　　9nine                         9thninth　　10ten                         10thtenth　　11eleven                       11theleventh　　12twelve                       12thtwelfth　　13.thirteen                       13ththirtee

3、nth　　14fourteen                      14thfourteenth　　15fifteen                        15thfifteenth　　16sixteen                        16thsixteenth　　17seventeen                      17thseventeenth　　18eighteen                       18theighteenth　　19nineteen                       19thnineteenth　　20

4、twenty                        20thtwentieth　　21twenty-one                     21sttwenty-first　　22twenty-two                     22ndtwenty-second　　30thirty                          30ththirtieth　　40forty                           40thfortieth　　50fifty                           50thfiftieth　　60sixt

5、y                           60thsixtieth　　70seventy                         70thseventieth　　80eighty                          80theightieth　　90ninety                          90thninetieth　　100ahundred                     100thhundredth　　0    *nought         0ispronouncednoughtbeforeapointandohafte

6、rapointin　　BritishEnglish.ItispronouncedzeroinUSEnglish.　　100     ahundred　　1,000   athousand　　1,000,000amillion　　1,000,000,000abillion(USEnglish)    　　1,000,000,000,000abillion(BritishEnglish)　　Inthepass,USandBritishbillionswerenotthesame.ButUSbillionsarenowoftenusedbyBritishcompaniesandnewspapers

7、.　　Fractions　　1/4 aquarter  1/3athird  1/2ahalf  4/5 fourfifths　　Decimals　　0.5 noughtpointfive　　0.25noughtpointtwofive　　10.06tenpointohsix　　27.27twenty-sevenpointtwoseven　　*Pronouncenumbersindividuallyafter