a sheep is eating grass at the foot of the hill变复数

问题描述:

a sheep is eating grass at the foot of the hill变复数

Some sheep are eating grass at the foot of the hill.
分析 sheep 单数与复数相同.
祝你假期愉快!加油!不明白再问!foot的复数不是feet吗不用变,因为at the foot of ...固定用法‘ 在……脚下’