twenty years has gone so fast 为什么用has而不是have?

The work has lived here for twenty years_____ A,since twenty years ago B.since he came hereC.twenty years ago D.twenty years before 为啥啊 the worker has liwed here for twenty years____ A.since twenty years agoB.since he come hereC.twenty years ago D.twenty years before 原因啊 . China has changed a lot in the past twenty years the factory has been open for twenty years 还是the factory has been opened for twenty years? 英语翻译she has taught art for twenty-five yearsshe's taught art for twenty-five years The worker has lived here fortwenty years______ A,since twenty years ago B,since he came hereC,twenty years ago D.twenty years before 补全括号里的 Mrs Wang has taught for twenty years.She has twenty-year teaching (e)ddddddddddddddddddddd twenty years has gone so fast 为什么用has而不是have? this factory______for twenty years A.has been open B.has been opened 要详解This factory ( )for twenty years.A.has opened B.has openC.has been poen D.has been popened The farmer has lived in that small house_______A.since twenty years B.for twenty yearsC.twenty years ago D.for twenty years ago但我想知道为什么不选其他的,请详解,逐个排除, 1.Miss Brown has taught physics for twenty years.(对画线部分提问)急!twenty是划线部分~~ TWENTY YEARS AFTER怎么样 请问twenty years from Jack‘s grandmother ___for more than twenty years.A has dead B has been died C has been died Twenty years ______ passed since I came here.填的是 have 还是 has.为什么? Twenty years has passed since he left his hometown.如何翻译? Someone _____ it twenty years ago.为什么用stole 而不用has stolen?