re: 21 Years Old Or 21-Year-Old? page 3
Hi there, why do some people put "21 years old or 21-year-old?" Can you tell me why and how to use it? Thank you
I am 21 years old.
I am 21-year-old.
He is 26 years old
I am 21 years old.
I am 21-year-old.
He is 26 years old
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This question was answered (and approved) eight years ago.