malperfektaoj
Malperfektaoj is a term used in Esperanto to refer to imperfective aspects of verbs. In Esperanto grammar, verbs can be conjugated to express not only tense (past, present, future) but also aspect, which describes the duration or completion of an action. The imperfective aspect specifically refers to an action that is ongoing, habitual, or incomplete, without emphasizing its completion.
This concept is conveyed through verbal adverbs and participles. For instance, the present active participle ending