基數詞：

1one

2two

3three

4four

5five

6six

7seven

8eight

9nine

10ten

11eleven

12twelve

13thirteen

14fourteen

15fifteen

16sixteen

17seventeen

18eighteen

19nineteen

20twenty

21twenty-one

22twenty-two

23twenty-three

24twenty-four

25twenty-five

26twenty-six

27twenty-seven

28twenty-eight

29twenty-nine

30thirty

31thirty-one

32thirty-two

33thirty-three

34thirty-four

35thirty-five

36thirty-six

37thirty-seven

38thirty-eight

39thirty-nine

40forty