x years old
fixed phr..fixed phr.. A phrase used to say how old someone or something is. You replace 'X' with a number.
fixed phr.. A fixed adjectival phrase stating the age of a noun, formed by a cardinal number followed by 'years old'. It typically functions as a predicative adjective after the verb 'to be'.
My cat is three years old.
The building is over one hundred years old and is now a protected landmark.
Although the wine is only ten years old, its complex bouquet suggests a maturity far beyond its age.
This phrase follows a form of the verb 'to be' (e.g., 'am', 'is', 'are').
Contrast this predicative form ('The boy is ten years old') with the hyphenated attributive form ('He is a ten-year-old boy').
He is seven year old.He is seven years old.Use the plural 'years' for any age greater than one.