现在完成时 have done sth 动词是短暂性动作 现在完成进行时have been doing sth 动词是慢性或说持续性动作
现在完成时 形式是 have done 现在完成进行时 形式是 have been doing sth
延续性动词呀！have/has done have/has been doing
延续系动词
