People often feed some grass ------- sheep填介词

some grass to sheep
sheep 单复数都有一样
再问： 题目问的是这个：People often feed some grass ( )sheep. 填介词
再答： 介词 to 人们经常把一些草拿去喂羊。
再问： 那feed on 和feed with 又分别是什么意思呢？
再答： feed with 拿某东西喂 feed on 以某东西为食 feed the sheep with some grass 用草喂羊 sheep feed on grass 羊以草为食