sorry,I can't open the door,for I__the key to it,为什么答案是lost,

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sorry,I can't open the door,for I__the key to it,为什么答案是lost,而不是have lost?
我根据经验选的lost,但是没法说服自己为啥不选have lost?因为钥匙丢了,对现在的影响是造成我打不开门啊,这个难道不是影响(⊙_⊙)?
百度搜索出来也各说纷纭,没到点上.
希望哪个大虾能帮助解决.
还有怎么判断到底过去发生的事对现在有么有影响?

如果原句用 have lost,意思就变了,就变成：我开不了门,因为我丢过钥匙,但现在已经找到的.有一种现在完成时表示现在之前业已完成的动作,虽然其效果或影响仍然存在但已不再继续,例如：Thomas has studied Russian.(现在不再学俄语)
I have lost the key(说明现在已找到）
影响还在,但动作已经停止了.
可能你会问：he has died不就说明他现在又火锅来了吗?所以he has died 后面必须接时间段,就是for xxxyears.
再把你上面的例子修改一下：I havn't eaten for three days,for I have lost the key to the door for three days.

sorry,I can't open the door,for I__the key to it,为什么答案是lost, Sorry,I can’t open the door,for I the key to it.A.lost B.los Sorry,I can't open the door,for I ( ) the key to it. I can't open the door,for I___the key to it 英语时态的用法Sorry,I can't open the door ,for I _the key to itA lo I can't open the door with this key.Why not( )it with anothe I'm sorry I can't go in because Ilost the key to the door The door is open.Who ____(open)it?Sorry,I dont't know.为什么? I can't find the key to my office,I( )have lost it on my way I can't open the door because I (leave) the key in the offic The door is open.Who has opened(open)it?Sorry,I don't know.为 what has happened?I __ (lose) my key and can't open the door