The sequence of tenses (known in Latin as consecutio temporum, and also known as agreement of tenses, succession of tenses and tense harmony) is a set of grammatical rules of a particular language, governing the agreement between the tenses of verbs in related clauses or sentences.
A typical context in which rules of sequence of tenses apply is that of indirect speech. If, at some past time, someone spoke a sentence in a particular tense (say the present tense), and that act of speaking is now being reported, the tense used in the clause that corresponds to the words spoken may or may not be the same as the tense that was used by the original speaker. In some languages the tense tends to be "shifted back", so that what was originally spoken in the present tense is reported using the past tense (since what was in the present at the time of the original sentence is in the past relative to the time of reporting). English is one of the languages in which this often occurs. For example, if someone said "I need a drink", this may be reported in the form "She said she needed a drink", with the tense of the verb need changed from present to past.
The "shifting back" of tense as described in the previous paragraph may be called backshifting or an attracted sequence of tenses. In languages and contexts where such a shift does not occur, there may be said by contrast to be a natural sequence.
In English, an attracted sequence of tenses (backshifting) is often used in indirect speech and similar contexts. The attracted sequence can be summarized as follows: If the main verb of a sentence is in the past tense, then other verbs must also express a past viewpoint, except when a general truth is being expressed. [1]
For example, if Batman spoke the following words:
the speech act may be reported using the following words:
with the present tense need replaced by the past tense needed, since the main verb of saying (said) is in the past tense. Further examples can be found at Uses of English verb forms § Indirect speech.
In some cases, though, a natural sequence of tenses is more appropriate. Here the tense of a verb in a subordinate clause is not determined by the tense of the verb in the superordinate clause, but is determined simply according to the sense of the clause taken apart from the rest of the sentence. [2] The rule for writers following the natural sequence of tenses can be expressed as follows: imagine yourself at the point in time denoted by the main verb, and use the tense for the subordinate verb that you would have used at that time. [3] Thus the tense used in the indirect speech remains the same as it was in the words as originally spoken. This is normal when the main verb is in the present or future tense (as opposed to past tense or conditional mood). For example:
However it is also possible to use the natural sequence even if the main verb is past or conditional:
This option is more likely to be used when the circumstance being expressed remains equally true now as it did when the speech act took place, and especially if the person reporting the words agrees that they are true or valid.
Debate amongst grammarians over the appropriateness of the two types of sequence of tenses goes back as far as the 18th century. [2] Use of the attracted sequence sometimes leads to additional problems when the grammatical construction of indirect speech includes an incorporated quotation – that is, when an attempt is made (though using indirect rather than direct speech) to report the words actually spoken. For example, if a minister spoke the words "Such a policy is not without its drawbacks", then a writer may attempt to report this as follows: [1]
using quotation marks to denote that that portion of the sentence represents the minister's actual words. This, however, requires use of the natural sequence of tenses, which might not be felt appropriate in the given situation. There are various possible solutions to this problem: [1]
Similar problems arise from the other changes that typically occur in indirect speech, such as changes of pronoun (depending on speaker), etc.
For more details, see the article on indirect speech, and also the article on uses of English verb forms, particularly the sections on indirect speech and dependent clauses.
Indirect speech in Russian and other Slavic languages generally uses the natural sequence of tenses (there is no backshifting). For examples, see Indirect speech § Russian.
In Latin, the sequence of tenses rule affects dependent verbs in the subjunctive mood, mainly in indirect questions, indirect commands, and purpose clauses. [4] If the main verb is in one of the non-past tenses, the subordinate verb is usually in the present or perfect subjunctive (primary sequence); if the main verb is in one of the past tenses, the subordinate verb is usually in the imperfect or pluperfect subjunctive (historic sequence). For example, when the subordinate verb refers to a time contemporaneous or later than the time of the main verb, the present or imperfect subjunctive is used:
When the subordinate verb refers to a time earlier than that of the main verb, the perfect or pluperfect subjunctive is used:
If the main verb is a historic present (i.e. a present tense with a past meaning), either primary or historic sequence may be used, or in a long sentence even a mixture of the two:
If the main verb is a perfect tense, it is usually followed by the historic sequence, but if the meaning is equivalent to an English present perfect (i.e. "have done"), it may be followed by primary sequence:
There are frequent exceptions to the sequence of tenses rule (see Latin tenses#Sequence of tenses rule). For example, verbs in conditional clauses do not usually follow the rule:
Consecutive clauses also do not always follow the rule:
When the sentence is an indirect statement (which uses the accusative and infinitive construction in Latin), the main verb of the reported sentence is an infinitive which remains unchanged, no matter what the tense of the main verb. The present infinitive is used for a situation contemporaneous with the main verb: [5]
The perfect infinitive is used for an event or situation earlier than the time of the main verb:
However, subordinate clauses in an indirect statement use the subjunctive mood, which is subject to the sequence of tenses rule:
In Classical Greek, the tenses in subordinate clauses must correspond to those in the superordinate clauses governing them. [7]
A principal tense (present tense, future tense, or perfect tense) in the superordinate clause is followed by a principal tense in the indicative mood or subjunctive mood. Such a principal tense is followed by: [7]
A historical tense (imperfect, pluperfect, or aorist) in the superordinate clause is followed by a historical tense in the indicative mood or optative mood. Such a historic tense is followed by: [7]
The set of rules comprising the sequence of tenses (and modes of the main and subordinate clauses) in the Italian language corresponds in general to the "consecutio temporum" of the Latin grammar.
To determine the form of the verb in the subordinate clause it is necessary to know:
The various combinations are summarized in four tables (see below).
Main clause | Subordinate clause | Temporal relationship |
Luisa sa (present) | che ieri sono andato a Roma (present perfect) | anteriority |
che adesso vado a Roma (present) | contemporaneity | |
che domani andrò a Roma (simple future) | posteriority |
If the verb of the main clause is in the past (simple past, imperfect, or past perfect), the verbal forms of the subordinate clause refer to the moment indicated in the main clause and adapt accordingly. The present in the subordinate clase will transform to imperfect, the past will become past perfect, etc.:
Main clause | Subordinate clause | Temporal relationship |
Luisa sapeva (imperfect) | che ero andato a Roma (past perfect) | anteriority |
che andavo a Roma (imperfect) | contemporaneity | |
che sarei andato a Roma (conditional perfect) | posteriority |
Despite the use of the subjunctive, the verbal tenses follow rules similar to those of the Indicative mood. The Present Indicative of the subordinate clause will be substituted with the subjunctive present; similarly, the present perfect will be substituted with its correspondent form, that of the past subjunctive and the Past perfect tense with the subjunctive past perfect.
Main clause | Subordinate clause | Temporal relationship |
Luisa pensa (present) | che io sia andato a Roma (past subjunctive) | anteriority |
che io vada a Roma (present subjunctive) | contemporaneity | |
che andrò a Roma (simple future) | posteriority |
If the verb of the main clause is in the past tense, the verbal forms of the subordinate will be adapted to that of the main clause:
Main clause | Subordinate clause | Temporal relationship |
Luisa pensava (imperfect) | che fossi andato a Roma (past perfect subjunctive) | anteriority |
che andassi a Roma (subjunctive imperfect) | contemporaneity | |
che sarei andato[ citation needed ] a Roma (past conditional) | posteriority |
The subjunctive is a grammatical mood, a feature of an utterance that indicates the speaker's attitude toward it. Subjunctive forms of verbs are typically used to express various states of unreality such as wish, emotion, possibility, judgment, opinion, obligation, or action that has not yet occurred; the precise situations in which they are used vary from language to language. The subjunctive is one of the irrealis moods, which refer to what is not necessarily real. It is often contrasted with the indicative, a realis mood which principally indicates that something is a statement of fact.
In grammar, a future tense is a verb form that generally marks the event described by the verb as not having happened yet, but expected to happen in the future. An example of a future tense form is the French aimera, meaning "will love", derived from the verb aimer ("love"). The "future" expressed by the future tense usually means the future relative to the moment of speaking, although in contexts where relative tense is used it may mean the future relative to some other point in time under consideration.
Verbs constitute one of the main parts of speech in the English language. Like other types of words in the language, English verbs are not heavily inflected. Most combinations of tense, aspect, mood and voice are expressed periphrastically, using constructions with auxiliary verbs.
The present tense is a grammatical tense whose principal function is to locate a situation or event in the present time. The present tense is used for actions which are happening now. In order to explain and understand present tense, it is useful to imagine time as a line on which the past tense, the present and the future tense are positioned. The term present tense is usually used in descriptions of specific languages to refer to a particular grammatical form or set of forms; these may have a variety of uses, not all of which will necessarily refer to present time. For example, in the English sentence "My train leaves tomorrow morning", the verb form leaves is said to be in the present tense, even though in this particular context it refers to an event in future time. Similarly, in the historical present, the present tense is used to narrate events that occurred in the past.
Conditional sentences are natural language sentences that express that one thing is contingent on something else, e.g. "If it rains, the picnic will be cancelled." They are so called because the impact of the main clause of the sentence is conditional on the dependent clause. A full conditional thus contains two clauses: a dependent clause called the antecedent, which expresses the condition, and a main clause called the consequent expressing the result.
In Portuguese grammar, nouns, adjectives, pronouns, and articles are moderately inflected: there are two genders and two numbers. The case system of the ancestor language, Latin, has been lost, but personal pronouns are still declined with three main types of forms: subject, object of verb, and object of preposition. Most nouns and many adjectives can take diminutive or augmentative derivational suffixes, and most adjectives can take a so-called "superlative" derivational suffix. Adjectives usually follow their respective nouns.
In French grammar, verbs are a part of speech. Each verb lexeme has a collection of finite and non-finite forms in its conjugation scheme.
Indirect speech, also known as reported speech, indirect discourse (US), or ōrātiō oblīqua, is the practice, common in all Latin historical writers, of reporting spoken or written words indirectly, using different grammatical forms. Passages of indirect speech can extend from a single phrase to an entire paragraph, and this style was generally preferred by Roman historians to the direct speech commonly found in Greek authors.
Ancient Greek grammar is morphologically complex and preserves several features of Proto-Indo-European morphology. Nouns, adjectives, pronouns, articles, numerals and especially verbs are all highly inflected.
The conditional mood is a grammatical mood used in conditional sentences to express a proposition whose validity is dependent on some condition, possibly counterfactual.
Romance verbs are the most inflected part of speech in the language family. In the transition from Latin to the Romance languages, verbs went through many phonological, syntactic, and semantic changes. Most of the distinctions present in classical Latin continued to be made, but synthetic forms were often replaced with more analytic ones. Other verb forms changed meaning, and new forms also appeared.
In linguistics, speech or indirect discourse is a grammatical mechanism for reporting the content of another utterance without directly quoting it. For example, the English sentence Jill said she was coming is indirect discourse while Jill said "I'm coming" would be direct discourse. In fiction, the "utterance" might amount to an unvoiced thought that passes through a stream of consciousness, as reported by an omniscient narrator.
Ancient Greek verbs have four moods, three voices, as well as three persons and three numbers.
Tense–aspect–mood or tense–modality–aspect is a group of grammatical categories that are important to understanding spoken or written content, and which are marked in different ways by different languages.
The optative mood is a grammatical mood of the Ancient Greek verb, named for its use as a way to express wishes.
Portuguese verbs display a high degree of inflection. A typical regular verb has over fifty different forms, expressing up to six different grammatical tenses and three moods. Two forms are peculiar to Portuguese within the Romance languages:
Modern standard English has various verb forms, including:
The main Latin tenses can be divided into two groups: the present system, consisting of the present, future, and imperfect; and the perfect system, consisting of the perfect, future perfect, and pluperfect.
Conditional clauses in Latin are clauses which start with the conjunction sī 'if' or the equivalent. The 'if'-clause in a conditional sentence is known as the protasis, and the consequence is called the apodosis.
In Latin, there are different modes of indicating past, present and future processes. There is the basic mode of free clauses and there are multiple dependent modes found exclusively in dependent clauses. In particular, there is the 'infinitive' mode for reported satetements and the 'subjunctive' mode for reported questions.