一把将来时的被动语态.When will they finish their homework?怎样改成被动语态?

其实可以这样判断,直接把时间状语省略,然后把这个特殊疑问句改成陈述句,就是they will finish their homework.变成被动语态就是their homework will be finished,那么再把这个被动语态的句子变成特殊疑问句就是when will their homework be finished?