教科版EEC六年级下册月份January MarchFebruary AprilMay June月份July AugustSeptember OctoberNovember December基数词变序数词基变序,有规律,第一、二、三全要变①词尾字母th ②八减t,九减e ③f要把ve替④ ty变tie ⑤①one——first,two——second,three——third。②four-fourth,seven-seventh,hundred-hundredth。③eight——eighth,nine—ninth。④five—fifth,twelve—twelfth。⑤twenty—twentieth,sixty——sixtieth。Play a game :