He has been collecting some sand from many places.是什么时态?是现在完成进行时吗?

long has he been away? He has never been abroad,has he?怎么翻译 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. He has been to the Great Wall中为什么been He has never been abroad before.这里的been是什么 为什么he has never been to London,has he?为什么后面用has he? he has always been a good neighbour.为什么用has? He has been here for two weeks改同义句He has been here ( )two weeks( ) He has been to Beijing和He has been in Beijing有什么区别?