为什么有have taken place 这种被动用法?happen take place 不是没有被动吗?有许多诸如"Many changes have taken place in China over the years ."怎么回事?

Great changes have taken place in the rural areas in the last two decades.为什么用have taken place 而不是have been taken place have been taken place 与have taken place的区别 为什么有have taken place 这种被动用法?happen take place 不是没有被动吗?有许多诸如Many changes have taken place in China over the years .怎么回事? great changes ___in our hometown in the past ten yearsa have taken place b have been taken place c were taken place 为什么不用被动式 Great changes____in the last ten years in my hometown A.have taken place B.have been taken placeC.took place D.were taken place 选什么为什么 In our company,great changes____since the new manager came.A.took place B.take place C.will have taken place D.have taken place选什么,为什么 great changes ___ since new China _____in 1949.A.have been taken place ,was founded B.took place,founded C.have taken place / was founded D.have taken place ,founded 选哪个?为什么?中文意思是? Great changes have taken place in my hometown since 1980 .为什么不能用被动语态 have been taken ... great changes (have taken)place in China sinace 1987为什么用have 而不用 has great changes----in china since 1919A have been taken place B have taken place为什么答案是B 为什么 不用被动语态 Great changes have taken place since liberation Great changes have taken place there. Many changes have taken place since Great changes____in Shanghai since 1990A took place B are taken place Chave taken place D have been taken place Greet changes have taken place the last three years.这句为什么用take place而不用happen Great changes have taken place since then in the factory where we 为什么用where 不用which 原句不是有in了吗 the things talked about in this report __over a year agohad taken place have taken place was taken place great changes have taken place ...in china是taken而不是 take对吗?是不是因为take place 无被动 但有完成时?那过去发生该怎么说?