70 years old与70-year-old的区别及其用法?
问题描述：
70 years old与70-year-old的区别及其用法?
答
70-year-old用于名词前面作定语,如He is a 70-year-old man.
70 years old常用作表语,如He is 70 years old.
答
70-year-old可做定语,如：He is a 70-year-old man.
但 70 years old 不能做定语,可做表语,如：He is 70 years old.
不明白的再问哟,请及时采纳,多谢!