有下列几种情况 1 动词是BE时的现在完成时：如 He has been to America several times . 2 有些终止性动词的现在完成时与一段时间连用时,如 The fish has been dead for two hours .( die-> be dead ) 3 现在完成时的被动词语态,如 People who have been invited to the party are very excited . 如果不明白,请再问；如果对你有所帮助, 请点击本页面中的“选为满意回答”按钮,
