per·fec·tive /pɝˈfɛktɪv ||ˈpɚ/
  (a.)完成的,完成式的完成式
  Per·fect·ive a.
  1. Tending or conducing to make perfect, or to bring to perfection; -- usually followed by of. “A perfective alteration.”
     Actions perfective of their natures.   --Ray.
  ◄ ►
  perfective
       n 1: a tense of verbs used in describing action that has been
            completed (sometimes regarded as perfective aspect)
            [syn: perfective tense, perfect, perfect tense]
       2: the aspect of a verb that expresses a completed completed
          action [syn: perfective aspect]