首先,你说的这句话是不对的。应为:He works several days.你写的没有个对的。 一般疑问句: Does he work several days. 特殊疑问句: How long does he work? 否定句 : He doesn't work several days.
一般疑问句 Does he work every day?否定句 He doesn't work every day?特殊疑问句How often does he work?