some sheep是可數還是不可數

　　There seems to be some sheep eating grass on the hill.

　　山上似乎有一些羊在吃草。

　　As sheepherders, Zang and Gu lost some sheep due to their neglect.

　　臧與谷兩個牧羊人，他們都因疏忽而丟失了一些羊。

　　So the news last summer that some sheep are shrinking came as a surprise.

　　因此，去年夏季傳出有些羊正在縮小的消息，著實令人大吃一驚。