1-20的英语序数词怎么说：

1 first

2 second

3 third

4 fourth

5 fifth

6 sixth

7 seventh

8 eighth

9 ninth

10 tenth

11 eleventh

12 twelfth

13 thirteenth

14 fourteenth

15 fifteenth

16 sixteenth

17 seventeenth

18 eighteenth

19 ninteenth

20 twentieth

1-20的英语基数词怎么说：

one 1

two 2

three 3

four 4

five 5

six 6

seven 7

eight 8

nine 9

ten 10

eleven 11

twelve 12

thirteen 13

fourteen 14

fifteen 15

sixteen 16

seventeen 17

eighteen 18

nineteen 19

twenty 20