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No particular past time frame is specified for the action/event. When a past time frame (a point of time in the past, or period of time which ended in the past) is specified for the event, explicitly or implicitly, the simple past is used rather than the present perfect. The tense may be said to be a sort of mixture of present and past.
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
The past perfect progressive or past perfect continuous (also known as the pluperfect progressive or pluperfect continuous) combines perfect progressive aspect with past tense. It is formed by combining had (the past tense of auxiliary have), been (the past participle of be), and the present participle of the main verb.
The pluperfect and future perfect forms combine perfect aspect with past and future tense respectively. This analysis is reflected more explicitly in the terminology commonly used in modern English grammars, which refer to present perfect, past perfect and future perfect (as well as some other constructions such as conditional perfect).
This is in contrast to the present perfect, which is not normally used with a marker of past time: one would not say "I have done it last Tuesday", since the inclusion of the past time marker last Tuesday would entail the use of the simple past rather than the present perfect. The English future perfect places the action relative only to the ...
The main Latin tenses can be divided into two groups: the present system (also known as infectum tenses), consisting of the present, future, and imperfect; and the perfect system (also known as perfectum tenses), consisting of the perfect, future perfect, and pluperfect. [1] [2] [3] [4]
Finnish and Hungarian, both members of the Uralic language family, have morphological present (non-past) and past tenses. The Hungarian verb van ("to be") also has a future form. Turkish verbs conjugate for past, present and future, with a variety of aspects and moods. Arabic verbs have past and non-past; future can be indicated by a prefix.
This is followed by the simple past tense , and then the past participle. If there are irregular present tense forms (see below), these are given in parentheses after the infinitive. (The present participle and gerund forms of verbs, ending in -ing, are always regular. In English, these are used as verbs, adjectives, and nouns.)