按要求改写句子：1、The man outside the door must be Mr.Green .(改为否定句）
The man outside the door ___ ___ be Mr.Green .
2、The dictionary belongs to (Jack) (对括号里的内容提问）
___ ___ the dictonary beong to
3、Do you know what time it is (改为同义句）
Do you ___ ___ ___ what time it is