ten years old 和ten-year-old的区别

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tenyearsold和ten-year-old的区别tenyearsold和ten-year-old的区别tenyearsold和ten-year-old的区别tenyearsold是短语ten-y

ten years old 和ten-year-old的区别
ten years old 和ten-year-old的区别

ten years old 和ten-year-old的区别
ten years old 是短语
ten-year-old 是连字符单词,是形容词
两者有不同用法.例句
The boy,who is ten years old,will be staring high school in September.
The ten-year-old boy will be starting highs school in September.

第一个是词组,第二个组合起来可以做定语,修饰名词。
例句。He is ten years old. 他十岁了
He is a ten-year-old boy.他是个十岁的男孩儿。
特别注意将第一个转化为第二个做定语的时候,year用单数。
Have a nice day~

一样的意思,就是写法不一样

ten years old 三个单词,作表语,如:He is ten years old.
ten-year-old 一个单词,形容词,作定语,如:He is a ten-year-old boy.
希望对你有启发

前一个是名词性短语,后面的是形容词短语