have/had been down怎么看是表示被动还是延续?

have/had been down怎么看是表示被动还是延续? have been doing,had been doing,will have been down是什么 The work （）down by the time you get hereA：will have been down B：is down C：had been downD：would have down 选什么 为什么啊 Jimmy would not have been stopped if he had gone down a side street. down 与have been down的区别 have done.have been done .had done.had been done 有什么区别?怎么用?有什么结构? have been down 和 have down 区别是? he had been here,everything would have been all right和had he been here ,everything would have been all right 的区别是什么?怎么判断的, have been talking, had been told? 2006 山东临沂A report says hundreds and thousands of trees ______in the Amazon rainforest last yearA.was cut down B have been cut downc were cut down D had been cut down 我选的是D have been 与had been在遇到什么局子时have been 改用had been The car ran down the hill,and the driver_,according to the newspaper,to have been killed.said,was saying,was said ,had been said选哪个 I have been dowm that road.句子中的down是什么词性啊现在完成时的主动时态构成不是have/had+Ved吗?这里的been是什么意思呢?down这个词又是怎么回事呢?请大家帮忙分析一下这句话,谢谢! have been / has been / had been 的区别 has been / have been /had been ………… I have been down for two hours.句型转换 I have been down ---- ---- ----. had been只是is的过去完成时么?怎么把 It had been a good day 改成疑问句?have been to 是不是固定搭 had been done 怎么用?