6. 英语里的十几和几十怎么写 10: ten
11: eleven
12: twelve
13: thirteen
14: fourteen
15: fifteen
16: sixteen
17: seventeen
18. eighteen
19. nineteen
20: twenty
30: thirty
40: forty
50: fifty
60: sixty
70: seventy
80: eighty
90: ninety
7. 英语1 前为基数词，后为序数词
1:one first
2:two second
3:three third
4:four fourth
5:five fifth
6:six sixth
7:seven seventh
8:eight eighth
9:nine ninth
10:ten tenth
11:eleven eleventh
12:twelve twelfth
13:thirteen thirteenth
14:fourteen fourteenth
15:fifteen fifteenth
16:sixteen sixteenth
17:seventeen seventeenth
18:eighteen eigteenth
19:nineteen nineteenth
20:twenty twentieth
21:twenty-one twenty-first
22:twenty-two twenty-second
23:twenty-three twenty-third
24:twenty-four twenty-fourth
25:twenty-five twenty-fifth
26:twenty-six twenty-sixth
27:twenty-seven twenty-seventh
28:twenty-eight twenty-eighth
29:twenty-nine twenty-ninth
30:thirty thirtieth
第1 first 1st 第2 second 2nd 第3 third 3rd 第4 fourth 4th 第5 fifth 5th 第6 sixth 6th 第7 seventh 7th 第8 eighth 8th 第9 ninth 9th 第10 tenth 10th 第11 eleventh 11th 第12 twelfth 12th 第13 thirteenth 13th 第14 fourteenth 14th 第15 fifteenth 15th 第16 sixteenth 16th 第17 seventeenth 17th 第18 eighteenth 18th 第19 nineteenth 19th 第20 twentieth 20th 第21 twenty-first 21st 第22 twenty-second 22nd 第23 twenty-third 23rd 第24 twenty-fourth 24th 第25 twenty-fifth 25th 第26 twenty-sixth 26th 第27 twenty-seventh 27th 第28 twenty-eighth 28th 第29 twenty-ninth 29th 第30 thirtieth 30th