文档介绍：中考重要知识点--------------基数词和序数词口诀:基变序,有规律;一二三特殊记,ve要用f替;八加h,九去e;十几要加th;y结尾变ie,后面加上th;几十几,前面不变,后用序。基数词序数词缩写基数词序数词缩写1onefirst1st23twenty-threetwenty-third23rd2twosecond2nd24twenty-fourtwenty-fourth24th3threethird3rd25twenty-fivetwenty-fifth25th4fourfourth4th26twenty-sixtwenty-sixth26th5fivefifth5th27twenty-seventwenty-seventh27th6sixsixth6th28twenty-eighttwenty-eighth28th7sevenseventh7th29twenty-wenty-ieth90th15fifteenfifteenth15th44forty-fourforty-fourth44th16sixteensixteenth16th55fifty-fivefifty-fifth55th17seventeenseventeenth17th66sixty-sixsixty-sixth66th18eighteeneighteenth18th77seventy-sevenseventy-eenth19th88eighty-eighteighty-y-y-ninth99th21twenty-onetwenty-first21st22twenty-twotwenty-second22nd语法:序数词通常与the连用日期的表达:最常见的形式the+序数词+of+月份