Imperfective aspect

The imperfective aspect, sometimes known as the continuous or progressive aspect, is a grammatical aspect. Along with the aorist aspect and the perfective aspect, the imperfective aspect is one of three aspects used in Indo-European languages.

The imperfective aspect implies that the verb in question refers to an action or event that does not have a fixed temporal boundary, as opposed to the perfective aspect, which describes an action or event of fixed temporal dimension.

In modern Indo-European languages, the concepts of aspect and tense are usually conflated.