关于英语怎么分清哪个是过去式 Who answered the Telephone?

关于英语怎么分清哪个是过去式 Who answered the Telephone? Nobody answered the telephone. who answered the telephone.能否换成who did answer the telephone 关于英语的问题请将以下句子改成特殊疑问句：1.My boss answered the telephone.2.He s 为什么是 It is I who answered the phone.而不是It is me who answered he has just answered the telephone the telephone kept rang until I answered 英语完形when i answered the telephone this morning,i knew at onc 怎么分清哪个是抽屉数哪个是物体数? Nobody answered the telephone.（写同意句） Nobody answered the telephone.的同义句是什么? an old woman answered the telephone 被动语态