四年级英语下册第8课ppt课件.ppt

文档介绍：First,second,。one,two,three,four,five,six...3序数词的含义表示次序的数词叫序数词,是由基数词变化而来的。4基数词变序数词,其规律为: 一二三,特别记,其余后加-th。 (first,second,third)five,twelve两兄弟,f要将ve替。八减t,九去e y变为ie,然后再加-th  如遇“几十几”,十位不变变个位。如遇整十位,y变ie再加th。5one1stfirst6two2ndsecond73rdthirdthree8four4thfourth9five5thfifthtwelve12thtwelftheight8theighthnine9thninth10