They have collected stamps since 1986.改为被动语态

They have collected stamps since 1986.改为被动语态 I have been collected stamps these yeas.与I have collected stamps.有什么区别? 英语翻译(however) many stamps they have collected has nothing to do with meI would like to gather (whatever) useful information to update my web page 请问have collected 和have been collecting 有什么区别 现在完成进行时的被动语态结构是have been +过去分词还是have been+doing例如：They have been collecting some stamps since2000Some stamps have been collected by them since 2000 I ＿ over 2500 kinds of stamps so far.A.collected B.have collecting C.have collected D.have beenD.have been collected They collected eggs (on the farm).(对划线部分提问) Have you ever collected _____填anything还是something Have I ever collected waste paper or bottles for recycling? My cousins have collected stamps for two years. They have ___ stamps from different countries.为什么不能填a few呢?a few不是也修饰不可数名词的吗?a few可以修饰可数名词吗？ 英语翻译“weather forecasting has been done by national government,although,since any rain forecast for London incorporates data collected from as far away as Fiji,they have to cooperate. They have They collected some wood to ----- (点火)for cooking.根据所给中文填空 have been doing 和have+过去分词有什么不同?RT 比如have been collecting 和have collected的不同之处 1.we played a lot of games last week（改为一般疑问句）2.they like playing basketball.（改成否定句—）3.I have five pencils in my pencil box（对话线部分提问）画线为five4.they collected eggs on the farm.（对话线部分 ----How many stampe have you collected so far?----__ ___ ___ ____(300多张) the scientists have collected much____about the south pole.A advice B opinions C storiesD information 翻译 The works of art have been collected by the people of France over many centuries