出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/04/03 08:23:38」(JST)
The past tense is a grammatical tense whose principal function is to place an action or situation in past time. In languages which have a past tense, it thus provides a grammatical means of indicating that the event being referred to took place in the past. Examples of verbs in the past tense include the English verbs sang, went and was.
In some languages, the grammatical expression of past tense is combined with the expression of other categories such as mood and aspect (see tense–aspect–mood). Thus a language may have several types of past tense form, their use depending on what aspectual or other additional information is to be encoded. French, for example, has a compound past (passé composé) for expressing completed events, an imperfect for expressing events which were ongoing or repeated in the past, as well as several other past forms.
Some languages that grammaticalise for past tense do so by inflecting the verb, while others do so periphrastically using auxiliary verbs, also known as "verbal operators" (and some do both, as in the example of French given above). Not all languages grammaticalise verbs for past tense – Mandarin Chinese, for example, mainly uses lexical means (words like "yesterday" or "last week") to indicate that something took place in the past, although use can also be made of the tense/aspect markers le and guo.
The "past time" to which the past tense refers generally means the past relative to the moment of speaking, although in contexts where relative tense is employed (as in some instances of indirect speech) it may mean the past relative to some other time being under discussion.[1] A language's past tense may also have other uses besides referring to past time; for example, in English and certain other languages, the past tense is sometimes used in referring to hypothetical situations, such as in condition clauses like If you loved me ..., where the past tense loved is used even though there may be no connection with past time.
Some languages grammatically distinguish the recent past from remote past with separate tenses. There may be more than two distinctions.
A general past tense can be indicated with the glossing abbreviation PST.
The European continent is heavily dominated by Indo-European languages, all of which have a past tense. In some cases the tense is formed inflectionally as in English see/saw or walk/walked and as in the French imperfect form, and sometimes it is formed periphrastically, as in the French passé composé form. Further, all of the non-Indo-European languages in Europe, such as Basque, Hungarian, and Finnish, also have a past tense.
In English, the past tense (or preterite) is one of the inflected forms of a verb. 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 different 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.
Past events are often referred to using the present perfect construction, as in I have finished (also known as present in past). However this is not regarded as an instance of the past tense; instead it is viewed as a combination of present tense with perfect aspect, specifying a present state that results from past action.[2] (It can be made into a past tense form by replacing the auxiliary have with had; see below.)
Various multi-word constructions exist for combining past tense with progressive (continuous) aspect, which denotes ongoing action; with perfect aspect; and with progressive and perfect aspects together. These and other common past tense constructions are listed below.
For details of the usage of the various constructions used to refer to the past, see Uses of English verb forms. Note that the past tense is also used in referring to some hypothetical situations, not necessarily connected with past time, as in if I tried or I wish I knew. (For the possible use of were in place of was in such instances, see English subjunctive.)
German uses two forms for the past tense.
In southern Germany, Austria and Switzerland, the preterite is mostly used solely in writing, for example in stories. Use in speech is regarded as snobbish and thus very uncommon. South German dialects, such as the Bavarian dialect, as well as Yiddish, and Swiss German have no preterite, but only perfect constructs.
In certain regions, a few specific verbs are used in the preterite, for instance the modal verbs and the verbs haben (have) and sein (be).
In speech and informal writing, the Perfekt is used (e.g., Ich habe dies und das gesagt. (I said this and that)).
However, in the oral mode of North Germany, there is still a very important difference between the preterite and the perfect, and both tenses are consequently very common. The preterite is used for past actions when the focus is on the action, whilst the present perfect is used for past actions when the focus is on the present state of the subject as a result of a previous action. This is somewhat similar to the English usage of the preterite and the present perfect.
Dutch mainly uses these two past tenses:
Less common is the voltooid verleden tijd, which corresponds to the English past perfect. It is formed by combining an onvoltooid verleden form of zijn ("to be") or hebben ("to have") with the notional verb, for example: Ik was daar voor gisteren al geweest. This means "I had been there before yesterday." This tense is used to indicate that one action in the past occurred before another past action, and that the action was fully finished before the second action took place.
In non-Germanic Indo-European languages, past marking is typically combined with a distinction between perfective and imperfective aspect, with the former reserved for single completed actions in the past. French for instance, has an imperfect tense form similar to that of German but used only for past habitual or past progressive contexts like "I used to..." or "I was doing...". Similar patterns extend across most languages of the Indo-European family right through to the Indic languages.
Unlike other Indo-European languages, in Slavic languages tense is independent of aspect, with imperfective and perfective aspects being indicated instead by means of prefixes, stem changes, or suppletion. In many West Slavic and East Slavic languages, the early Slavic past tenses have largely merged into a single past tense. In both West and East Slavic, verbs in the past tense are conjugated for gender (masculine, feminine, neuter) and number (singular, plural).
French has numerous forms of the past tense including but not limited to:
For more details, see French verbs.
Whilst in Semitic languages tripartite non-past/past imperfective/past perfective systems similar to those of most Indo-European languages are found, in the rest of Africa past tenses have very different forms from those found in European languages. Berber languages have only the perfective/imperfective distinction and lack a past imperfect.
Many non-Bantu Niger–Congo languages of West Africa do not mark past tense at all but instead have a form of perfect derived from a word meaning "to finish". Others, such as Ewe, distinguish only between future and non-future.
In complete contrast, Bantu languages such as Zulu have not only a past tense, but also a less remote proximal tense which is used for very recent past events and is never interchangeable with the ordinary past form. These languages also differ substantially from European languages in coding tense with prefixes instead of such suffixes as English -ed.
Other, smaller language families of Africa follow quite regional patterns. Thus the Sudanic languages of East Africa and adjacent Afro-Asiatic families are part of the same area with inflectional past-marking that extends into Europe, whereas more westerly Nilo-Saharan languages often do not have past tense.
Past tenses are found in a variety of Asian languages. These include the Indo-European languages Russian in North Asia and Persian, Tajik, Urdu, and Hindi in Southwest and South Asia; the Turkic languages Turkish, Turkmen, Kazakh, and Uyghur of Southwest and Central Asia; Arabic in Southwest Asia; Japanese; the Dravidian languages of India; the Uralic languages of Russia; Mongolic; and Korean. Languages in East Asia and Southeast Asia typically do not distinguish tense; in Mandarin Chinese, for example, the particle 了le when used immediately after a verb instead indicates perfective aspect.
In parts of islands in Southeast Asia, even less distinction is made, for instance in Indonesian and some other Austronesian languages. Past tenses, do, however, exist in most Oceanic languages.
Among Native American languages there is a split between complete absence of past marking (especially common in Mesoamerica and the Pacific Northwest) and very complex tense marking with numerous specialised remoteness distinctions, as found for instance in Athabaskan languages and a few languages of the Amazon Basin. Some of these tenses can have specialised mythological significance and uses.
A number of Native American languages like Northern Paiute stand in contrast to European notions of tense because they always use relative tense, which means time relative to a reference point that may not coincide with the time an utterance is made.
Papuan languages of New Guinea almost always have remoteness distinctions in the past tense (though none are as elaborate as some native American languages), whilst indigenous Australian languages usually have a single past tense without remoteness distinctions.
Creole languages tend to make tense marking optional, and when tense is marked invariant pre-verbal markers are used.[3]
In Belizean Creole, past tense marking is optional and is rarely used if a semantic temporal marker such as yestudeh "yesterday" is present.
Singaporean English Creole (Singlish) optionally marks the past tense, most often in irregular verbs (e.g., go → went) and regular verbs like accept which require an extra syllable for the past tense suffix -ed.
Hawaiian Creole English[4] optionally marks the past tense with the invariant pre-verbal marker wen or bin (especially older speakers) or haed (especially on the island Kauai). (Ai wen si om "I saw him"; Ai bin klin ap mai ples for da halade "I cleaned up my place for the holiday"; De haed plei BYU laes wik "They played BYU last week"). The past habitual marker is yustu (Yo mada yustu tink so "Your mother used to think so").
Haitian Creole[5] can indicate past tense with the pre-verbal marker te (Li te vini "He (past) come", "He came").
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