[C/U]linguisticsthe form of a verb group indicating whether an action, event, or situation is seen as continuing or as complete. In English there are two aspects, the progressive, such as ‘is arriving' or ‘was arriving', and the perfective, such as ‘has seen' and ‘had seen'. 体(动词词组形式,用于表示动作、事件或情况是持续的还是完成的)