My little brother sleeps nine hours every day.(划线提问)

问题描述:

My little brother sleeps nine hours every day.(划线提问)
How ________ hours _________ your little brother sleep every?

many ; does
nine houres 是可数名词,用how many提问
整个句子的主语是 your little brother,第三人称单数,时态为一般现在时,用does