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?

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?
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?

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