国产成人v爽在线免播放观看,日韩欧美色,久久99国产精品久久99软件,亚洲综合色网站,国产欧美日韩中文久久,色99在线,亚洲伦理一区二区

學(xué)習(xí)啦>原創(chuàng)作品專(zhuān)欄>學(xué)習(xí)心得>

英語(yǔ)常用數(shù)詞學(xué)習(xí):基數(shù)詞、序數(shù)詞

時(shí)間: 春生1139 分享

  (1)1-20

  one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,thirteen,fourteen,fifteen, sixteen,seventeen,eighteen,nineteen,twenty

  (2)21-99 先說(shuō)“幾十”,再說(shuō)“幾”,中間加連字符。

  23→twenty-three,34→thirty-four,45→forty—five,56→fifty-six,67→sixty-seven,78→seventy-eight,89→eighty-nine,91→ninety-one

  (3)101—999先說(shuō)“幾百”,再加and,再加末兩位數(shù)或末位數(shù);

  586→five hundred and eighty-six,803→eight hundred and three

  (4)l,000以上,先從右往左數(shù),每三位數(shù)加一個(gè)“,”,第一個(gè)“,”前為thousand.第二個(gè)“,”前為million,第三個(gè)“,”前為billion

  1,001→one thousand and one

  18,423→eighteen thousand,four hundred and twenty-three

  6,260,309→six million two hundred and sixty thousand three hundred and nine

  750,000,000,000→seven hundred and fifty billion

  序數(shù)詞

  (1)一般在基數(shù)詞后加th

  eg.four→fourth,thirteen→thirteenth

  (2)不規(guī)則變化

  one→first,two→second,three→third,five→fifth,eight→eighth,nine→ninth,twelve—twelfth

  (3)以y結(jié)尾的十位整數(shù),變y為ie再加th

  twenty→twentieth, forty→fortieth, ninety→ninetieth

  (4)從二十一后的“幾十幾”直至“幾百幾十幾”或“幾千幾百幾十幾”只將個(gè)位的基數(shù)詞變?yōu)樾驍?shù)詞。

  twenty-first,two hundred and forty-fifth

  基數(shù)詞轉(zhuǎn)為序數(shù)詞的口訣:

  基變序,有規(guī)律,詞尾加上-th.

  一,二,三,特殊記,詞尾字母t,d,d.

  八去t,九去e, ve要用f替。

  ty將y變成i,th前面有個(gè)e.

  若是碰到幾十幾,前用基來(lái)后用序。

  本文作者:陸聰(微信公眾號(hào):陸聰老師)

  本文為原創(chuàng)文章,版權(quán)歸作者所有,未經(jīng)授權(quán)不得轉(zhuǎn)載!


3855267