There must be 和It must be有什么区别?急急!

There must be 和It must be有什么区别?急急! there must be something wrong to it It must be there,---?反意疑问句 .It’s not here .It must be _____ ( anywhere ) there 英语翻译it might be fun 和it must be It Must Be?歌词 it must be Must mu 什么意思 There can only be one auto column and it must be defined as a key There ___something in the bag It's so heavyA must haveB must be C can'tD might be There is someone in the room.It must be my brother为什么要用IT “There must be some reason for it”中的“for it”有什么用? There must be something wrong. must be 几个用法的区别There must be,it must be,this/that must be这三者有什么区别?说清楚,说例句.（ ）must be something wrong with the CPU.（选哪个?）这道题貌似一直都争议很大呀! Since there is water everywhere,last night Since there is water everywhere, last night. a.it must have been rained b.it must have rainedc.it must be raining d.it must rain中文意思,选择哪一个,为什么? 求翻译和用法及场合 IT MUST BE DOWN 英译汉：There must be something visiting the homes in our neighborhood,but what is it? my watch doesn't work.there must be something w_____with it