先看例子:1.He is sixteen years old.
2.They are sixteen --year---olds.
3.He is a sixteen--year---old boy.
例2 中 sixteen --year---olds是名词 例3中sixteen--year---old 是定语
先看例子:1.He is sixteen years old.
2.They are sixteen --year---olds.
3.He is a sixteen--year---old boy.
例2 中 sixteen --year---olds是名词 例3中sixteen--year---old 是定语