He must have been at home all day last night的反义疑问句怎样问?

He must haven't been at home all day last night.反义疑问句，先生。。。he must have been at home all day last night,后面是didn't he?还是wasn't he?有什么依据我會選擇wasn't he?didn't he?=he didn't stay home all day last night.wasn't he?=he wasn't at home all day last night.