Mother'Day is celebrated at different times in different countries.请问这句话为什么要用“is celebrated”而不用“celebrates”、“celebrate”、“was celebrate”呢?

分类: 作业答案 • 2022-02-17 12:44:40

问题描述：

Mother'Day is celebrated at different times in different countries.
请问这句话为什么要用“is celebrated”而不用“celebrates”、“celebrate”、“was celebrate”呢?

答