基数词+yearsold和基数词-year-old区别

Question

基数词+years old和基数词-year-old区别

Answer 1

基数词　加上　years old,合并用作表语,表示人的年纪.例如：
I am thirty (years old),but you are only twelve.我已经三十岁了,而你只有十二岁.
注意,这时 years old　是可以省略的.
基数词-year-old,其实就变成复合词了,可以作为定语.例如：
That thirty-year-old young man is very promising.　那个三十岁的小伙子很有前途.
注意,这时的 -year-old　绝对不可以省略.