I. perfective [美 pərˈfɛktɪv, 英 pəˈfɛktɪv] 形
- perfective
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II. perfective [美 pərˈfɛktɪv, 英 pəˈfɛktɪv] 名词
- the perfective
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单语范例（未经PONS编辑处理）
Many phrases can not be used in the perfective in this way, as the referent is as yet incomplete.
en.wikipedia.org The meaning is identical or similar in each case, but differs in that perfective verbs are seen as completed and imperfective verbs as ongoing.
en.wikipedia.org A verb in the perfective aspect causes its arguments to be marked using an ergative pattern, while the imperfective aspect triggers accusative marking.
en.wikipedia.org It exists only for transitive verbs, and almost only if they are perfective.
en.wikipedia.org For imperfective verbs, it is formed analytically, for perfective verbs it is identical with the present tense.
en.wikipedia.org