sheep的复数形式怎么写

　　sheep例句分享

　　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。

　　The island is populated largely by sheep.

　　这个岛的主要生物是绵羊。