The ice has been melted .为什么这个现在完成时要加been,been不是被动语态吗?

The ice has been melted .为什么这个现在完成时要加been,been不是被动语态吗? Over the past decades,sea ice has been decreasing in the Arctic as a result of global warming什么 Over the past decades,sea ice has been decreasing in the Arctic as a result of global warming什么 this domain name has been seized by ICE求翻译 Over the past decades,sea ice ___ in the Arctic as a result of global warming.A.had decreased B.decreased C.has been decreasing D.is decreasing The dream has been awake 英语与数学相结合,关于hockeyIn hockey,a plus(+)is awared every time you are on the ice for a goal your team scores and a minus(-)is given when you are on the ice when the other team scores.for eight straight games Cassie has been on the ice 英文译成中文 （报38）Season：The competition has always been in the summer months,except the seasonal competitions such as Interneiges ( Intervilles in the snow ) and Interglaces ( Intervilles on ice ).【A Popular Tv show-Intervilles 】 The ice In the past decades,sea ice ______ in the Arctic as a result of global warming.A．had meltedB．has been meltingC．meltedD．is melting Over the past decades,sea ice ________ in the arctic as a result of global warming.A had decreased B decreasedC has been decreasingD is decreasing此题为什么选答案C, ）Over the past decades,sea ice in the Arctic as a result of global warming.）Over the past decades,sea ice in the Arctic as a result of global warming.A.had decreased B.decreased C.has been decreasing D.is decreasing 解释一下 the shop has been( )since 2011 The World Has Never Been Untrue是什么意思 Only you take the soul has been The activation mail has been sent Hello!Teacher the foot has been good? TesTPattern92:the job has been cencal是什么意思