sheep是可數名詞還是不可數名

The path was no better than a sheep track.

那條小路簡直就像是羊腸小道。

The sheep are allowed to roam freely on this land.

綿羊可以在這片地上自由走動。

At clipping time sheep need to be penned.

在剪羊毛時,需要把羊圈起來。