forty的序数词是什么,1-100的序数词是什么
摘要1的序数词 first 2: second 3: third 4: forth 5: fifth 6: sixth 从七开始到20，序数词=数词+th: 7: seventh……18forty的序数词
1的序数词 first
2: second
3: third
4: forth
5: fifth
6: sixth
从七开始到20，序数词=数词+th: 7: seventh……18forty的序数词是什么：eighteenth; 19: nineteenth
20: twentyth
从21开始：21: twenty-first; 22: twenty-second……规律：前面是十位数，后面再加上1~9的序数词。
例如：31: thirty-first; 45: forty-fifth
100: hundredth
