20的英语序数词怎么写( 三 ) _序数词

7. 1到30的序数词英文怎么写首先搞清楚基数词和序数词，
基数词，表示数量，1,2,3，表示多少个
序数词，表示顺序，第1，第2，第3，表示第几个
1-30的序数词，前3个是特殊情况，需要单独记忆，从4开始往后，基本上都是在基数词的词根后面加th，但是词根变化较多，尤其结尾部分，要注意。
还有，所有序数词之前，都要加the 。
1-10,first, second, third,fourth,fifth,sixth,seventh,eighth,ninth,tenth
11-20,eleventh,twelfth,thirteenth,fourteenth,fifteenth,sixteenth,seventeenth,eighteenth,nineteenth,twentieth
21-30,twenty first, twenty second,twenty third,twenty-fourth,twenty-fifth,twenth-sixth, twenty-seventh,twenty-eighth,twenty-ninth,thirtieth
8. 1到20的英语序数词 1到20的英语2113序数词1）序数词5261第一至第二十的数4102字为： first (1st) second (2nd) third (3rd) fourth (4th) fifth (5th) sixth (6th) seventh (7th) eighth (8th) ninth (9th) tenth (10th) eleventh (11th) twelfth(12th) thirteenth (13th) fourteen (14th) fifteenth (15th) sixteenth (16th) seventeen (17th) eighteenth (18th) nineteenth (19th) twentieth (20th) 注：英语序数词第1-19除了first、second、third 有特殊形1653式外，其余回均由基数词加后缀-th 构成。
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