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

来源：学生作业帮助网编辑：作业帮时间：2024/04/28 13:12:44

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

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

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