这句话的意思是汤姆在家里做他的家庭作业.如果要将它变成一般疑问句,那么就应该是问汤姆在家里写作业吗?就是Does Tom do his homework
at home
变否定句的话：Tom doesn't do his homework at home
划线提问：如果划线部分是at home 的话,那么就应该问汤姆在哪里写作业?
就是 Where does Tom do his homework?