he has been worried for a long time since he____(ask)to give a talk

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 Dan has been worried all week and he's still worried.这里的still he has been worried for a long time since he____(ask)to give a talk Dan Robinson has been worried all week.has been worried可不可以改成has worried.为什么能or not long has he been away? 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 He has never been abroad,has he?怎么翻译 mom has been (worried about) 还是worrying about my health all the time he has been to beijing.什么时态? 翻译: He has been dozens of times. he has been there _twice____.画线提问 he has been in english since last He has been here ___since yesterday.___ He has never been there.英译汉 He has not been back yet He has been( )(die) fou two days. He has been abroad many times. He think he has been to shanghai ,does he.