Mother'Day is celebrated at different times in different countries.

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?

这句话是被动句句中省略了主语,mother's day是被庆祝的,所以用is celebrated表被动语态,而不用celebrates或celebrate.若说我们庆祝mother's day 就是主动句就可用We celebrate mother's day 或People celebrate moth...