是不可以的.a three-year-old相当于形容词,一个3岁的.而a three years old boy用法是错的,正确表述应该为The boy is three year old.才对.
顺便说一下,many thanks!不怎么用语口语不恰当,可以这样说thank you very much.
是不可以的.a three-year-old相当于形容词,一个3岁的.而a three years old boy用法是错的,正确表述应该为The boy is three year old.才对.
顺便说一下,many thanks!不怎么用语口语不恰当,可以这样说thank you very much.