you are a dog还是 you are dog,为什么?

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you are a dog还是 you are dog,为什么?

You are a dog.是正确的.因为dog是可数名词,在句中不是用单数就用复数,要不就特指;绝对不能单独用dog.

dog 是可数名词.所以是you are a dog. 要么you are dogs

单数you are a dog.
复数 you are dogs.

You are a dog.