a two-year -old boy two-years-old two years old 这些类似的都怎么区分要有实际例子和意思

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a two-year -old boy two-years-old two years old 这些类似的都怎么区分要有实际例子和意思
a two-year -old boy two-years-old two years old 这些类似的都怎么区分
要有实际例子和意思

a two-year -old boy two-years-old two years old 这些类似的都怎么区分要有实际例子和意思
a two-year -old boy 一个两岁的男孩.没有 two-years-old 这种用法;
two years old 两岁.如
He is a two -year-old boy.
The boy is two years old.
加油!不明白再问!

two-year-old是形容词,翻过来就是两岁大的,这个造词法很常用,就是数字-量词单数-形容词,比如三米长就是three-meter-long,这个通常是加在所形容的名词前的,比如The two-year-old girl is my sister.注意中间的量词是单数形式,所以个人认为应该是没有two-years-old这种用法的。two years old是比较普通的用法,用在be动词的句...

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two-year-old是形容词,翻过来就是两岁大的,这个造词法很常用,就是数字-量词单数-形容词,比如三米长就是three-meter-long,这个通常是加在所形容的名词前的,比如The two-year-old girl is my sister.注意中间的量词是单数形式,所以个人认为应该是没有two-years-old这种用法的。two years old是比较普通的用法,用在be动词的句子里,比如The boy is two years old,或者I was two years old at that time.

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这很容易区分。 two-year-old 在句中充当定语,就是两岁的•••••••后面接名词,简单记就是有连字符的中间都不加s,不过注意是充当定语。
如:He is a two-year-old boy.
如果没有连字符的就要注意year的单复数,
He is two years old. ...

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这很容易区分。 two-year-old 在句中充当定语,就是两岁的•••••••后面接名词,简单记就是有连字符的中间都不加s,不过注意是充当定语。
如:He is a two-year-old boy.
如果没有连字符的就要注意year的单复数,
He is two years old. He is one year old.
明白了吗?

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