题目内容：

why he must leave now还是why must he leave now
都行吧

优质解答

Why must he leave now?
如为特殊疑问句,应为：Why must he leave now?
特殊疑问句结构：特殊疑问词＋一般疑问句?
如为从句,应为：why he must leave now.
从句的句式为陈述句句式.