Dan has been worried all week and he's still worried.这里的still

Dan Robinson has been worried all week.has been worried可不可以改成has worried.为什么能or not Dan has been worried all week and he's still worried.这里的still Dan Robinson has been worried all week 疑问Dan Robinson has been worried all week 这句中的用法是现在完成时has been加worried表示已经担心还是被动语态表示被担心啊 怎么区别 Dan Robinson has been worried all week.这里为什么有been,那was或者is之类怎么不行? He has been worried all week.为什么用has been worried,而不是has worriedhas been worried 不是被动吗?为什么要加 been 新概念英语2册34课,第一句话.Dan Robinson has been worried all week.这句话是现在完成时的被动语态,是不是错了啊,不应该用被动啊.新概念英语2册34课,第一句话 mom has been (worried about) 还是worrying about my health all the time he has been worried for a long time since he____(ask)to give a talk 一题英语同义句转换The mother is worried about her daughter who has been gone for two days.The mother is worried about her daughter who has been ——for two days. 这是被动语态还是现在完成时啊?新概念二册L34课文：Dance Robinson has been worried all the week.这里的has been worried是被动语态还是现在完成时啊 The police are worried about the ___(safe) of the little boy who has been missing for 3 days. --why do you look so worried?----My computer broke down and my essay __A__umfinished since.A has been left B has left为什么不选B呢? -Why you look so worried?-My computer roke down and my essay__unfinished since.a.was leftb.has leftc.leftd.has been left为什么是d不是a has been 时态分析新概念2 Lesson 34 quick workDan Robinson has been worried all week.现在完成时又不像,现在完成时被动语态,好像也不对,TKS! Sand storms( )North China several times these years.A attacked B have attacked C was attacked D had attacked改同义句The mother is worried about her daughter who has been gone for two daysThe mother is worried about her daughter who has been ( ) f worried 怎样用持续性动词就是说,有多少个常用的?什么时候用.bob-----for about two days.HIS mother is worried about himA has left home B didn't C has been ill这题就有关了吧?总之怎样用?