“Years Old” 和 “Year Old” 的正确用法

什么是 “years old”？

“Years old” 用于描述某人的年龄，通常出现在句子的谓语部分，表示“……岁了”。例如：

• She is ten years old.
• My brother is twenty-five years old.

注意：当数字大于 1 时，使用复数形式 “years”。

什么是 “year old”？

“Year old” 用作复合形容词，放在名词前修饰该名词，此时即使年龄大于 1，也使用单数形式 “year”，并用连字符连接。例如：

• a ten-year-old girl
• a five-year-old car
• He has a three-year-old son.

关键点：作为定语时，必须使用连字符，且 “year” 始终为单数。

常见错误示例

1. ❌ She is a ten years old girl.
   ✅ She is a ten-year-old girl.
2. ❌ He is five-year-old.
   ✅ He is five years old.
3. ❌ They adopted a three years old child.
   ✅ They adopted a three-year-old child.

总结口诀

“作表语用 years old，作定语用 year-old（带连字符）。”

记住这个规则，就能轻松区分两种用法！