what does jane's parents usually have for lunch?有没有对

does改为do吧 parents是复数

没错，改为陈述句就是 have sth for lunch 午餐吃什么
what 是have的宾语

这句话里有一个语法点：如果是第三人称单数，助动词do要变为does，但这里是两个人，所以不能用三单,他违反了这条规则，是错的

what do jane's parents usually have for lunch?