He can't be home now, for I saw him() in the gym just now.giving out/working out为什么不是giving out

He can't be home now, for I saw him() in the gym just now.giving out/working out为什么不是giving out He can't be at home.为什么can't后要加be? He can't be at home.为什么在at前面有be?什么情况下要加Be? now he ____(not be) at home he can't be at home与he may not be at home有什么不同?跪拜请求指点迷津. 改错.He mustn't be at home.I saw him here just now. He can't be at home.He went to the cinema.合并成一句话 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 英语求教啊!毕竟我是个英语废He must be working.（改否定猜测）Sally goes to school,she _____（can‘t be,must be）at home now.还有几十分钟就要去上课了快! -- ( )he be at home now -- Yes,he must.The light is on A.Must B.Can C.Does D.Could Henry ( ) be at home because he phoned me from the farm just now.a.mustn't b.isn't able toc may not d can't 为什么不选c,意思不是有可能吗? 九年级上册英语5单元题目Henry————be at home now because he phoned me from the school just now A mustn't B isn't be able to C can‘t老师说是C,因为基本这类型题目都是can’t must 之类的（表示这个 Bob must be at home,________?A.mustn't he B.can't he C.isn't he D.doesn't he 选哪一个?为什么? He__be at home now for yesterday he went to the USA. A.mustn'tB.can'tC.may notD.needn't I think he must be in the office now,______?A.don’t I B.mustn’t he C.isn’t he D.can’t hethe reason,please! ---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 he can't be her father,-----he? 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