year old,year-old,years old,years-old的区别

1个回答

  • year old只能是 He is only one year old.即years old的单数形式.

    years old就是一岁以上的了,例如She is three years old.

    year old 和 years old通常都作表语.

    首先要声明绝对没有years-old的说法,因为加上连接符以后year必须用单数.

    数字-year-old表示几岁,与前两个最大的区别就是它在句中只能充当定语.

    例如:a three-year-old boy一个三岁大的小男孩.

    但是不能说The boy is three-year-old.也就是说它不能充当表语,

    而要说 The boy is three years old.