老师说has只能用在陈述句中,如：My brother has a .到底什么时候用do does have has?

老师说has只能用在陈述句中,如：My brother has a .到底什么时候用do does have has?
老师说has只能用在陈述句中,如：My brother has a .到底什么时候用do does have has?

老师说has只能用在陈述句中,如：My brother has a .到底什么时候用do does have has?
在陈述句中是不需要助动词的,而在疑问句和否定句中都需要助动词,助动词就是do/does.,有助动词的情况下,动词都需要用原型啦.My brother has a . ,does your brother have a ..,? My brother doesn't have a .