two的序数词

2019年语法项目表之数词----序数词2019年语法备考项目表之数词------序数词序数词基数词简写序数词one1stfirsttwo2ndsecondthree3rdthirdfour4thfourthfive5thfifthsix6thsixthseven7thseventheight8theighthnine9th