20-20？

2 1-2 1

Twenty-two-twenty-two

23-23

Twenty-four

Twenty-five to twenty-five years old

26-26

27-27 years old

28-28

Twenty-nine to twenty-nine years old

Thirty minutes?

3 1-3 1

Thirty-two to thirty-two

33-33

Thirty-four-thirty-four

Thirty-five to thirty-five years old

Thirty six to thirty six

Thirty-seven to thirty-seven

38-38

39-39

40-40

The form of extended data cardinal words

Words that represent numbers are called cardinal words. Its form is as follows:

1. From1—10 One, two, three, four, five, six, seven, eight, nine, ten. ..

2. From11——19 Eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen ..

3. Except eleven, twelve, thirteen, five and eighteen are special forms, fourteen, sixteen, seventeen and nineteen are all composed of their single-digit forms with the suffix -teen.

4. Dozens of integers from 20 to 99, except for 20, 30, 40, 50, 80, 6, 70 and 90, are all single-digit forms, and the suffix -ty is added. When it represents dozens, add a hyphen "-"between dozens and the unit cardinal word form.

Sometimes two cardinal words in plural form can be written together: dreams of things, dozens of dreams, and so on.

6. Indicates a person's exact age or age, expressed in the plural form of dozens.

References:

Baidu Encyclopedia-Basic Vocabulary