UC知道I found a gray hair on his head.OK?
来源：百度知道 编辑：UC知道 时间：2024/05/09 05:16:07
Hair (u)?(c)?
昨天做题的时候还碰到来着～
hair在指满头的头发时可以用作集合名词，不可数；在指几根头发时就是可数了。所以I found a gray hair on his head.是正确的。
虽然hair一般不可数，但有很多不可数名词都这样，具体到某个句子里就可数了
hair 是不可数名词。直接说i found his hair is gray就行了，i found a gray hair 这种说法不对。不可数名词不能用a修饰。
指一根白头发，可数
可以。hair 既可数，又不可数。
hair 不可数
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