改为同义句：Would you mind his opening the door?

if he opened
“Would you mind if 从句”句型中,从句谓语常用虚拟语气.一般现在时和一般将来时的虚拟语气用一般过去时；一般过去时的虚拟语气用过去完成时.总之,向过去倒退一格.又如：
Would you mind if I used your bike?你介意我用你的自行车吗?（=Would you mind my using your bike?)
Would you mind if I took his place?我代替他好吗?(=Would you mind my taking his place?)
顺便说一下,在“Do you mind if从句”句型中,从句谓语常用一般现在时.如：
Do you mind if he attends the meeting?他参加会议好吗?(= Do you mind his attending the meeting?)Do you mind 和Would you mind有什么区别吗？什么是虚拟语气？还有，这里是不是只有用一般过去时作虚拟语态的？Would you mind好像不跟一般过去。Do you mind只是一般地询问，Would you mind是礼貌地委婉地征求意见。Would you mind后面接从句时可以不用虚拟语气，也可以用虚拟语气。用虚拟语气的情况更多。因为这个从句是与将来的事实相反，所以它只有一般过去时这种虚拟语气，没有过去完成时这种虚拟语气。Would you mind最常用的还是接doing。