He must be at home.为什么用be?

He must be playing computer games at home,isn't he,为何用isn't he? He must be at home.为什么用be? He must be at home.改为否定推测 he must be at home 如何构成反意疑问句 He must be at home 的一般疑问句 The l------is on ,He must be at home. he must be at home 改为否定推测 he ___ ___ at home 急 I think he must be at home now变反意疑问句I think he must be at home now,__? 为什么写成be at homeHe must be at home now.这一句里为什么不写成 He must be home now.be后面不是可以直接接副词吗? -- ( )he be at home now -- Yes,he must.The light is on A.Must B.Can C.Does D.Could you must be home at one.be home be home ”能不能换做at home may be 和 must be的区别是什么,老师说must be也是可能啊!比如he must be at home He must be at home now,___ ___?反意疑问句 应该填什么 反义疑问句1..He must be at home,-----------?2.Don't talk in class ,----------? 关于He can't be at home,isn't he?此句是否为反义疑问句?请问和He isn't at home,isn't he?有什么关系?为什么?也请解释一下“can't”在此处的意思.He must be a doctor,isn't he?You must have studied English for three years, Today is Wednesday.He _______be at home.He ______ be at school.A.can’t,can B.can’t,must C.mustn’t,must D.mustn’t,can ---Where is your brother?Is he at home?---No,he_____ be at home.He has gone to England.A.must B.mustn’t C.can’t D.may 他将在6点回家为什么是“he will be home at six 而不是”he will go home at six