isn't后面的动词变化

问题描述:

isn't后面的动词变化
isn't后面的动词用ing吗
提问:what does she do?
she...(填wash the clothes)
看看有没错,Do they visit the museum every day?

isn't后面的动词用ing,表现在进行时;动词be后过去分词表被动语态.