imperfective

The imperfective aspect is asymmetric in the present and the past, as discussed in the following sections.

Thus, in a language for instance where the Case marking on verb arguments might follow an ergative-absolutive pattern if the verb is in the perfective aspect, but a nominative-accusative one if the verb is imperfective, the Case of certain nouns couldn't be determined until the aspect of the verb is established.

Their topics include advancing cognitive linguistic approaches to Japanese language learning and instruction, a usage-based approach to presenting the polysemous particles ni and de in Japanese as a foreign language, and the effect of form-focused instruction on the second-language acquisition of the Japanese imperfective -teiru using prototype and traditional approaches.

From a linguistic perspective, it is interesting to note that Homer uses the imperfective aspect (i.e., present stem) twice: "was being dragged" (Greek: helkomenon) and "were dragging" (helkon).

However, the terms Imperfective, Perfective, Progressive are borrowed from Generative Grammar (Butt and Ramchand, 2003; Butt and Rizvi, 2008).

Thus, the master argument requires that we translate all imperfective verbs (verbs that express a progressive, habitual, or iterative aspects) into perfective descriptions (as a series of bounded and unitary events).

In the past tense, the copula is invariably inflected in the past perfect, and in the future it takes the future imperfective form nawan.

Some authors claim very decisively that the only function of some prefixes is "to transform imperfective verbs into perfective" (e.g., Kostov 1939: 120).