请问the door opened suddenly 这个opened后面的ed是什么意思?怎么来的?

S(),the door opened 请问the door opened suddenly 这个opened后面的ed是什么意思?怎么来的? He opened the door wide. He opened the door.变被动语态 Who opened the door?改为被动语态. The door opened.改为否定句 He has opened the door.和He opened the door.有什么区别? the door opened为什么不用被动语态?the door opened等于the door is open么?翻译起来一样么？ Robert opened the door and went in___ A.quite B.quitely C.quiet D.quietly 请问为什么 she opened the door and admitted us to go.请问正确吗?有admit sb to do的 结构吗 【the door opened and in he came the door opened and in he came 不应该为 the door opened and in came he 对把 倒装句子The door opened,in came a girl.句子 The door opened,in came a girl.为什么不是 The door opened ,came in a girl.?怎么理解? He opened the door to the balcony是什么意思 He opened the door and went t_____ to the hall. The boy ______(run) to the door and opened it. 请问这里为什么不用被动语态?语法书里写到,有一种动词可用做及物和不及物动词,这涉及宾语变为主语的情况,如：He opened he door.The door opened.请问第二句应该是被动语态形式吧? He has (opened the door).就划线部分提问 He opened the door puuietiy.这句话格式对吗