分类：教育/科学-外语学习
问题：请教一个英语问题读一读，查资料写出和下列基数词对应的序数词．1. 
读一读，查资料写出和下列基数词对应的序数词．1.one-_____  2.two-_____ 3.three-_____ 4.four-__5.five-_____  6.six-_____  7.seven-______  8.eight-_____ 9.nine-_____  10.ten-____ 11.eleven-___12.twelve-____ 13.thirteen .fourteem-___  15.fifteen-___  16.sixteen-____  17.seventeen-___ 18.eighteen-_读一读，查资料写出和下列基数词对应的序数词．1.one-_____  2.two-_____ 3.three-_____ 4.four-__5.five-_____  6.six-_____  7.seven-______  8.eight-_____ 9.nine-_____  10.ten-____ 11.eleven-___12.twelve-____ 13.thirteen .fourteem-___  15.fifteen-___  16.sixteen-____  17.seventeen-___ 18.eighteen-____  19.nineteen-____  20.twenty-____
回答：1. one-first  o-second ree-third ur-fourth ve-fifth(ve变成f,再加th,下面同twelve) x-sixth ven-seventh8. eight-eighth （直接加个h就行了,读作/eθ/,注意别读成了ei-t-θ，而应读成ei-tθ） ne-ninth(去掉e,再加th)10. ten-tenth 11. eleven-eleventh  elve-twelfth(同上面的five,ve变成f,再加th)从13到19与前面的4，6，7，10，11都在基数词后直接加上th就行了，加的th读作/θ/ irteenth urteenth fteen... xteen... venteen...18. eighteen... neteen... enty-twentieth(y变成ie,再加th)再补充点：从20开始的整拾（30，40，50，60，70，80，90）， y变成ie，再加th，(ti)eth读作/(ti)iθ/ enty-twentieth irty-thirtieth rty... fty... xty... venty...80. eighty... nety...从21到29，从31到39，...其它类推相同处理,都是整拾加上1到9的序数词：twenty-one    - twenty-firsttwenty-two    - twenty-secondtwenty-three  - twenty-thirdtwenty-four   - twenty-fourthtwenty-five   - twenty-fifthtwenty-six    - twenty-sixthtwenty-seven  - twenty-seventhtwenty-eight  - twenty-eighthtwenty-nine   - twenty-ninth...