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Perfective aspect. The perfective aspect (abbreviated PFV), sometimes called the aoristic aspect, [1] is a grammatical aspect that describes an action viewed as a simple whole, i.e., a unit without interior composition. The perfective aspect is distinguished from the imperfective aspect, which presents an event as having internal structure ...
The present perfect is a grammatical combination of the present tense and perfect aspect that is used to express a past event that has present consequences. [1] The term is used particularly in the context of English grammar to refer to forms like "I have finished". The forms are present because they use the present tense of the auxiliary verb ...
Unlike the present perfect, the past perfect can readily be used with an adverb specifying a past time frame for the occurrence. For example, it is incorrect to say * I have done it last Friday (the use of last Friday , specifying the past time, would entail the use of the simple past , I did it , rather than the present perfect).
The word perfect in this sense means "completed" (from Latin perfectum, which is the perfect passive participle of the verb perficere "to complete"). In traditional Latin and Ancient Greek grammar, the perfect tense is a particular, conjugated -verb form. Modern analyses view the perfect constructions of these languages as combining elements of ...
The choice of present perfect or past tense depends on the frame of reference (period or point in time) in which the event is conceived as occurring. If the frame of reference extends to the present time, the present perfect is used. For example: I have written a letter this morning. (if it is still the morning) He has produced ten plays.
Imperfect. The imperfect (abbreviated IMPERF) is a verb form that combines past tense (reference to a past time) and imperfective aspect (reference to a continuing or repeated event or state). It can have meanings similar to the English "was walking" or "used to walk". It contrasts with preterite forms, which refer to a single completed event ...
Continuous and progressive aspects. The continuous and progressive aspects (abbreviated CONT and PROG) are grammatical aspects that express incomplete action ("to do") or state ("to be") in progress at a specific time: they are non-habitual, imperfective aspects. In the grammars of many languages the two terms are used interchangeably.
v. t. e. In linguistics, aspect is a grammatical category that expresses how a verbal action, event, or state, extends over time. For instance, perfective aspect is used in referring to an event conceived as bounded and unitary, without reference to any flow of time during the event ("I helped him"). Imperfective aspect is used for situations ...