sheep是可数名词,只是它的单数和复数形式是一样的；
sheep n.羊;绵羊；复数 sheep；
例句
The sheep had got out and were loose on the road.
那些羊跑出来在路上自由自在地走动。
Sheep were grazing in the fields.
羊在野地里吃草。
The path was no better than a sheep track.
那条小路简直就像是羊肠小道。
The sheep are allowed to roam freely on this land.
绵羊可以在这片地上自由走动。
