HAS MENTIONED 和 HAS BEEN MENTIONED 有什么区别

HAS MENTIONED 和 HAS BEEN MENTIONED 有什么区别 From what has been mentioned as has been mentioned above... 请问As has been mentioned above和As have been mentioned above以及As is mentioned above 有什么区别? 如上所述As is mentioned above , As has been mentioned above, As was mentioned above,which is right? has from what has(have) been mentioned above,是上面提到单复数之分吗? Basketball has the smallest sized teams of all the team sports mentioned.SMALLEST SIZED 把mentioned,death,he,has,his,wife,never,since,her连成句子 has left 和 has been away from has been to 和has gone to 英译中,The System Testing for the above mentioned System has been carried out.It is hereby certified that the System Testing for the above mentioned System has been accomplished.The provisions of the contract and the requirements of the specificat Kindly to be informed that the mentioned name has no reservation with our hotel at this moment请翻 He_that his name not be mentioned.A.has asked B ask C has been told 老师说选A不能选C,为什么呢? mentioned have been 和has和has 在什么时候用呀 have和has的用法 have和has的用法.