the door opened,这句话不完整.你看看你这句话的出处是不是还有别的没写上来. 1.我们补充完整:sb make the door opened(make使) sb leave the door opened(leave让) sb keep the door opened(keep保持) 某人使门被打开,或某人使门处于开的状态.因为门是被开的所以用open+ed,由于前面有使动词(make,leave,keep)所以不需要be. 2.opened作定语修饰the door 我们可以理解为定语从句的省略. 完整的定语从句: ...the door( which/that is opened)... 省略连接词和be,保留分词opened 即...the door opened...