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she is 5 years old. 5 years old是名词还是形容词?
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five-year-old是复合形容词，只能作前置定语，用于修饰名词，意思是"五岁的"，例如，She is a five-year-old girl.(她是一个五岁的女孩)。 five years old用来作表语，意思是"五岁"，例如，She is five years old.(她五岁了)。 扩展资料： 英语中表示年龄的常用方法
She has a ten-year-old son. 她有个10岁的儿子。 Her son is ten years old. 她儿子10岁。 但是，许多同学们可能忽略了它的一个重要用法——这类词还可直接用作名词，并且是可数的，可以连用不定冠词，而且还可以有复数形式。如： She's quite clever for a ten-year-old.
"Years" is unit. It is a special class of noun that can combine with numerals to form phrases like "three metres" or "six pounds" These phrases may be used as modifier of an appropriate adjective. But there is a good deal of idiom. This structure works with length, time and age. Some similar expressions are not usually acceptable. five years ...
Lisa is 5 years old. Lisa is 5-year old. 5-year 这个合成词的最后一个单词是year, 所以整体是名词。 Lisa is 5-year-old. 5-year-old 这个合成词的最后一个单词是old, 所以整体是形容词。 Lisa is a 5-year-old girl. 以上四个句子都是正确的。
She has a ten-year-old son. 她有个 10 岁的儿子。 Her son is ten years old. 她儿子 10 岁。 但是，许多同学们可能忽略了它的一个重要用法——这类词还可直接用作名词，并且是可数的，可以连用不定冠词，而且还可以有复数形式。如： She's quite clever for a ten-year-old.
five-year-old的同義字five years old is an adjective he is five years old. five-year-old is a noun the five year old is sitting. |"five-year-old" can be an adjective or a noun. that five-year-old building or that five year old (refers to a child that is 5, and only a child, not an object) "five years old" is an adjective that child is five years old
five-year-old girl five-year-old 是形容词词性，用来修饰名词 类似的词是five-year old 我们可以从这两个例子中看出差别和用法： He is five-year old He is an five-year-old boy 从这两个句子可以看出， five-year old 是名词词性，在句子里作表语或者宾语；
five-year-oldfive years old is an adjective he is five years old. five-year-old is a noun the five year old is sitting. |"five-year-old" can be an adjective or a noun. that five-year-old building or that five year old (refers to a child that is 5, and only a child, not an object) "five years old" is an adjective that child is five years old的同义词
five-year-old是复合形容词，只能作前置定语，用于修饰名词，意思是"五岁的"，例如，She is a five-year-old girl.她是一个五岁的女孩。five years old用来作表语，意思是"五岁"。 older和elder的区别用法. 1、用于家人之间表示长幼关系，通常用elder(在美国英语中也用 ...
five years old 和five-year-old的区别five-year-old,"-"连接多个名词用作形容词的，只能用作前置的定于。不能作表语。be动词后面是表语。