I stood by the door ,not daring to say a wordstood为什么要过去式?不能用stand

I stood by the door ,not daring to say a wordstood为什么要过去式?不能用stand i found it by the door this moring my essays drive me mad,I have stood in front of the door of hell怎么翻译 I opened the cupboard door and then stood in front of it petrified.这里的petrified 从语法上是什么 翻译：He stood all the door with his head down he stood at back of the door.哪里错了, he was tired and stood a___ the door （ ）4.Tom stood by the door,his eyes ________upon the stranger.A.fixing B.fixed C.fix D.to fix She stood by the door,_ a wordA not daring say B daring not say C daring not to say D not to I stood on the bridge and waw watching the boats passing by请问by怎么解?请问:在这句话里,句尾为什么加个by? I heard someone open the door when I passed by 改错 I opened the cupboard door and then stood in front of it petrified.问一下这里的petrified是什么词性啊 I opened the cupboard door and then stood in front of it petrified.（新概念3 24）中的petrified怎么理解啊,怎么and之后有两个动词啊?还是什么?无法理解petrified和stood的关系是什么 I get by all the time on a shelf above the door. I was woken up in the night by the noise next door. I stood on the bridge and watched the boats passing by.by后为什么不加the bridge?只是为了避免重复吗 at the door和by the door有什么区别 do you know if the man -by the door is mr.smith?sure.we have known each other for a long time.为何选BA stand B standing C stood D stands