on my grandpa's brithday ,the whole family drinks to his hearth.译全句,另on为什么不用at?
问题描述：
on my grandpa's brithday ,the whole family drinks to his hearth.译全句,另on为什么不用at?
drinks为什么要加s,the whole family 所有家庭成员是复数呀.
答
在哪一天,应该用介词On,而不是at. The whole family 是一个整体看,而不是各个个体.