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"20-year-old" vs "20-years-old"

Both "20-year-old" and "20-years-old" are correct, but they are used in different contexts. "20-year-old" is used as an adjective before a noun to describe the age of a person, while "20-years-old" is used as a noun phrase after a linking verb to describe someone's age.

Last Updated: March 15, 2024

20-year-old

This phrase is correct and commonly used in English.

This phrase is used as an adjective before a noun to describe the age of a person. It is hyphenated and followed by a singular noun.

Examples:

  • She is a 20-year-old student.
  • The 20-year-old man won the race.
  • I met a 20-year-old artist yesterday.

Alternatives:

  • a 20-year-old
  • a 30-year-old
  • an 18-year-old
  • a 25-year-old
  • a 40-year-old

20-years-old

This phrase is correct and commonly used in English.

This phrase is used as a noun phrase after a linking verb to describe someone's age. It is not hyphenated and is followed by a plural noun.

Examples:

  • He is 20 years old.
  • She is 25 years old.
  • They are 30 years old.

Alternatives:

  • 30 years old
  • 18 years old
  • 25 years old
  • 40 years old
  • 50 years old

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