three years old 与 three-year-old 的区别

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three years old 与 three-year-old 的区别

three years old 与 three-year-old 的区别
three years old 与 three-year-old 的区别

three years old 与 three-year-old 的区别
three-year-old为形容词,比如:
my three-year-old sister
three years old为单词组合,比如
my sister is three years old.

无区别 同义短语

后者作定语
前者做表语
举例:
The little girl is three years old. 这个小女孩三岁了。 表语
three-year-old girl三岁大的小女孩 定语

前者是 三岁大,
后者是 三岁大的,后面需要跟一个名词,才完整
He is three years old.他三岁大
He has a three-year-old son.他有一个三岁大的儿子。
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