sheep的復數形式怎么寫

　　sheep例句分享

　　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。

　　The island is populated largely by sheep.

　　這個島的主要生物是綿羊。