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The past perfect, sometimes called the pluperfect, combines past tense with perfect aspect; it is formed by combining had (the past tense of the auxiliary have) with the past participle of the main verb. It is used when referring to an event that took place prior to the time frame being considered. [10]
In English grammar, the pluperfect (e.g. "had written") is now usually called the past perfect, since it combines past tense with perfect aspect. (The same term is sometimes used in relation to the grammar of other languages.) English also has a past perfect progressive (or past perfect continuous) form: "had been writing".
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).
The terms perfective and perfect should not be confused. A perfect tense (abbreviated PERF or PRF) is a grammatical form used to describe a past event with present relevance, or a present state resulting from a past situation. For example, "I have put it on the table" implies both that I put the object on the table and that it is still there ...
In Latin, most verbs have four principal parts.For example, the verb for "to carry" is given as portō – portāre – portāvī – portātum, where portō is the first-person singular present active indicative ("I carry"), portāre is the present active infinitive ("to carry"), portāvī is the first-person singular perfect active indicative ("I carried"), and portātum is the neuter supine.
The use of tenses is quite similar to English: In implicative conditional sentences, the present tense (or other appropriate tense, mood, etc.) is used in both clauses. In predictive conditional sentences, the future tense or imperative generally appears in the main clause, but the condition clause is formed with the present tense (as in English).
The past participle of regular verbs is identical to the preterite (past tense) form, described in the previous section. For irregular verbs, see English irregular verbs. Some of these have different past tense and past participle forms (like sing–sang–sung); others have the same form for both (like make–made–made).
The past tense of regular verbs is made by adding -d or -ed to the base form of the verb, while those of irregular verbs are formed in various ways (such as see→saw, go→went, be→was/were). With regular and some irregular verbs, the past tense form also serves as a past participle. For full details of past tense formation, see English verbs.