she has short hair(变复数)答案是they have short hair 他们是把人变复数了,我把头发变复数行吗?she has short hairs 他有好几根短头发可以吗?

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she has short hair(变复数)答案是they have short hair 他们是把人变复数了,我把头发变复数行吗?
she has short hairs 他有好几根短头发可以吗?

they have short hair.他们都是短发(表示发型不可数名词).they have short hairs.他们有几根短头发(具体一根一根的头发就变成可数名词了).she has short hair.意思是她是短发.如果说她有一根短头发,句子应该是she has a short hair.所以变为复数时不能改变意思,hair 表示发型,不能加S.

hair不能变复数,在这里属于不可数名词

hair 不用复数

hair做头发讲时时不可数的,做几根讲时时可数的。这个句子强调的是头发的长度,不是头发的根数。所以把头发变复数不可以。

They have short hair