Stem forms Conjugative suffixes and auxiliary verbs are attached to the stem forms of the affixee. In modern Japanese, there are six stem forms, ordered following from the endings that these forms have in verbs (according to the collation order of Japanese), where terminal and attributive forms are the same for verbs (hence only 5 surface forms), but differ for nominals, notably -nominals. ; (and ): is used for plain negative (of verbs), causative and passive constructions. The most common use of this form is with the auxiliary that turns verbs into their negative (predicate) form. (See Verbs below.) The version is used for volitional expression and formed by a . ; : is used in a linking role (a kind of
serial verb construction). This is the most productive stem form, taking on a variety of endings and auxiliaries, and can even occur independently in a sense similar to the ending. This form is also used to negate adjectives. ; : is used at the ends of clauses in
predicate positions. This form is also variously known as or – it is the form that verbs are listed under in a dictionary. ; : is prefixed to nominals and is used to define or classify the noun, similar to a
relative clause in English. In modern Japanese it is practically identical to the terminal form, except that verbs are generally not inflected for politeness; in old Japanese these forms differed. Further, -nominals behave differently in terminal and attributive positions; see
Adjectival verbs and nouns, below. ; : is used for conditional and subjunctive forms, using the ending. ; : is used to turn verbs into commands. Adjectives do not have an imperative stem form. The application of conjugative suffixes to stem forms follow certain .
Verbs in Japanese are rigidly constrained to the end of a clause. This means that the
predicate position is always located at the end of a sentence. {{fs interlinear|lang=ja|indent=3|glossing=no abbr The subject and objects of the verb are indicated by means of
particles, and the grammatical functions of the verb (primarily tense and voice) are indicated by means of
conjugation. When the subject and the dissertative topic coincide, the subject is often omitted; if the verb is intransitive, the entire sentence may consist of a single verb. Verbs have two tenses indicated by conjugation, past and non-past. The semantic difference between present and future is not indicated by means of conjugation. Usually there is no ambiguity as context makes it clear whether the speaker is referring to the present or future. Voice and aspect are also indicated by means of conjugation, and possibly agglutinating auxiliary verbs. For example, the continuative aspect is formed by means of the continuative conjugation known as the
gerundive or
form, and the auxiliary verb ; to illustrate, → . Verbs can be semantically classified based on certain conjugations. ; Stative verbs: indicate existential properties, such as , , , etc. These verbs generally do not have a continuative conjugation with because they are semantically continuative already. ; Continual verbs: conjugate with the auxiliary to indicate the progressive aspect. Examples: , , . To illustrate the conjugation, → . ; Punctual verbs: conjugate with to indicate a repeated action, or a continuing state after some action. Example: → ; → . ; Non-volitional verb: indicate uncontrollable action or emotion. These verbs generally have no volitional, imperative or potential conjugation. Examples: , . ; Movement verbs: indicate motion. Examples: , . In the continuative form (see
§ Verbal adverbs) they take the particle to indicate a purpose. There are other possible classes, and a large amount of overlap between the classes. Lexically, nearly every verb in Japanese is a member of exactly one of the following three regular
conjugation groups (see also
Japanese godan and ichidan verbs). ; : verbs with a stem ending in . The terminal stem form always rhymes with . Examples: , . ; : verbs with a stem ending in . The terminal stem form always rhymes with . Examples: , . (Some Group 1 verbs resemble Group 2b verbs, but their stems end in , not .) ; : verbs with a stem ending in a consonant. When this is and the verb ends in , it is not apparent from the terminal form whether the verb is Group 1 or Group 2b, e.g. . If the stem ends in , that consonant sound only appears in before the final of the
irrealis form. The "row" in the above classification means a row in the
gojūon table. "Upper 1-row" means the row that is one row above the center row (the -row) i.e. i-row. "Lower 1-row" means the row that is one row below the center row (the -row) i.e. -row. "5-row" means the conjugation runs through all 5 rows of the
gojūon table. A conjugation is fully described by identifying both the row and the column in the
gojūon table. For example, belongs to , belongs to , and belongs to . One should avoid confusing verbs in with verbs in or . For example, belongs to , whereas its homophone belongs to . Likewise, belongs to , whereas its homophone belongs to . Historically, Classical Japanese had , and a . The verbs became most of the verbs in modern Japanese (only a handful of verbs and a single verb existed in classical Japanese). The group was reclassified as the group during the post-WWII writing reform in 1946, to write Japanese as it is pronounced. Since verbs have migrated across groups in the history of the language, the conjugation of classical verbs cannot be ascertained from knowledge of modern Japanese alone. Of the irregular classes, there are two: ; -group: which has only one member, . In Japanese grammars these words are classified as , an abbreviation of , sa-row irregular conjugation). ; -group: which also has one member, . The Japanese name for this class is or simply . Classical Japanese had two further irregular classes, the -group, which contained and , the -group, which included such verbs as , the equivalent of modern , as well as quite a number of extremely irregular verbs that cannot be classified. The following table illustrates the stem forms of the above conjugation groups, with the root indicated with dots. For example, to find the hypothetical form of the group 1 verb , look in the second row to find its root, , then in the hypothetical row to get the ending , giving the stem form . When there are multiple possibilities, they are listed in the order of increasing rarity. • The and irrealis forms for Group 1 verbs were historically one, but since the post-WWII spelling reforms they have been written differently. In modern Japanese the form is used only for the volitional mood and the form is used in all other cases; see also the conjugation table below. • The unexpected ending is due to the verb's root being but only being pronounced before in modern Japanese. The above are only the stem forms of the verbs; to these one must add various verb endings in order to get the fully conjugated verb. The following table lists the most common conjugations. Note that in some cases the form is different depending on the conjugation group of the verb. See
Japanese verb conjugations for a full list. • This is an entirely different verb; has no potential form. • These forms change depending on the final syllable of the verb's dictionary form (whether etc.). For details, see
Euphonic changes, below, and the article
Japanese verb conjugation. The polite ending conjugates as a group 1 verb, except that the negative imperfective and perfective forms are and respectively, and certain conjugations are in practice rarely if ever used. The passive and potential endings and , and the causative endings and all conjugate as group 2b verbs. Multiple verbal endings can therefore agglutinate. For example, a common formation is the
causative-passive ending: . {{fs interlinear|lang=ja|indent=3 As should be expected, the vast majority of theoretically possible combinations of conjugative endings are not semantically meaningful.
Transitive and intransitive verbs Japanese has a large variety of related pairs of
transitive verbs (that take a direct object) and
intransitive verbs (that do not usually take a direct object), such as the transitive , and the intransitive . Note: Some intransitive verbs (usually verbs of motion) take what looks like a direct object, but is not. For example, : {{fs interlinear|lang=ja|indent=3
Adjectival verbs and nouns Semantically speaking, words that denote attributes or properties are primarily distributed between two morphological classes (there are also a few other classes): • – these have roots and conjugating stem forms, and are semantically and morphologically similar to
stative verbs. • – these are nouns that combine with the copula. Unlike adjectives in languages like English, -adjectives in Japanese inflect for aspect and mood, like verbs. Japanese adjectives do not have comparative or superlative inflections; comparatives and superlatives have to be marked periphrastically using adverbs like and . Every adjective in Japanese can be used in an
attributive position, and nearly every Japanese adjective can be used in a
predicative position. There are a few Japanese adjectives that cannot predicate, known as , which are derived from other word classes; examples include , , and which are all stylistic -type variants of normal -type adjectives. Some examples not based on are , , , and . All -adjectives except for have regular conjugations, and is irregular only in the fact that it is a changed form of the regular adjective permissible in the terminal and attributive forms. For all other forms it reverts to . • The attributive and terminal forms were formerly and , respectively; in modern Japanese these are used productively for stylistic reasons only, although many
set phrases such as and , derive from them. • The imperative form is extremely rare in modern Japanese, restricted to set patterns like , where they are treated as adverbial phrases. It is impossible for an imperative form to be in a predicate position. Common conjugations of adjectives are enumerated below. is not treated separately, because all conjugation forms are identical to those of . • Note that these are just forms of the -type adjective • Since most adjectives describe non-volitional conditions, the volitional form is interpreted as "it is possible", if sensible. In some rare cases it is semi-volitional: in response to a report or request. Adjectives too are governed by euphonic rules in certain cases, as noted in the section on it below. For the polite negatives of -type adjectives, see also the section below on the copula .
Copula ( ) The
copula behaves very much like a verb or an adjective in terms of conjugation. Note that there are no potential, causative, or passive forms of the copula, just as with adjectives. The following are some examples. In continuative conjugations, is often contracted in speech to ; for some kinds of informal speech is preferable to , or is the only possibility. ======
Historical sound change • Usually not reflected in spelling Modern pronunciation is a result of a long history of phonemic drift that can be traced back to written records of the 13th century, and possibly earlier. However, it was only in 1946 that the Japanese ministry of education modified existing
kana usage to conform to the . All earlier texts used the archaic orthography, now referred to as
historical kana usage. The adjoining table is a nearly exhaustive list of these spelling changes. Note that the palatalized morae and ( and ) combine with the initial consonant (if present) yielding a palatalized syllable. The most basic example of this is modern , which historically developed as → , via the → rule. A few sound changes are not reflected in the spelling. Firstly, merged with , both being pronounced as a long . Secondly, the particles and are still written using historical kana usage, though these are pronounced as and respectively, rather than and . For example, the modern reading (for ) arose from the historical . The latter was pronounced something like by the Japanese at the time it was borrowed (compare ). However, a modern reader of a classical text would still read this as , the modern pronunciation.
Verb conjugations Conjugations of some verbs and adjectives differ from the prescribed formation rules because of euphonic changes. Nearly all of these euphonic changes are themselves regular. For verbs the exceptions are all in the ending of the continuative form of group when the following particle or auxiliary is derived from the ancient perfective auxiliary
-tsu, including
-te,
-te ari →
-tari →
-ta. This is not the case with the unrelated desiderative auxiliaries
-tashi →
-tai and
-tagaru, however. • denotes impossible/ungrammatical form. There is one other irregular change: , for which there is an exceptional continuative form: + → , + → , etc. The more literary and/or dialectal variant is regular, hence . Older forms such as
iite and
ite have been recorded in 16th-century Christian publications. For verbs like , , etc., there is a clear preference for
sokuonbin in northern and eastern dialects, as in , ; and for
u-onbin in western and southern dialects, as in , . In standard Japanese (eastern), however, there are three exceptions where
u-onbin is preferred, , and . For these verbs,
sokuonbin is rare,/, / and . Forms such as , , , , have been reported as well.
Polite forms of adjectives The continuative form of proper adjectives, when followed by polite forms such as or , undergoes a transformation; this may be followed by historical sound changes, yielding a one-step or two-step sound change. Note that these verbs are almost invariably conjugated to polite form, as and (note the irregular conjugation of , discussed below), and that these verbs are preceded by the
continuative form – – of adjectives, rather than the terminal form – – which is used before the more everyday . The rule is → (dropping the ), possibly also combining with the previous syllable according to the spelling reform chart, which may also undergo palatalization in the case of . Historically there were two classes of proper
Old Japanese adjectives, and (" adjective" means "not preceded by "). This distinction collapsed during the evolution of
Late Middle Japanese adjectives, and both are now considered adjectives. The sound change for adjectives follows the same rule as for other adjectives, notably that the preceding vowel also changes and the preceding mora undergoes palatalization, yielding → , though historically this was considered a separate but parallel rule.
Respectful verbs Respectful verbs such as , , , , , etc. behave like group 1 verbs, except in the continuative and imperative forms.
Colloquial contractions In speech, common combinations of conjugation and auxiliary verbs are contracted in a fairly regular manner. There are occasional others, such as → as in → and → – these are considered quite casual and are more common among the younger generation. Contractions differ by dialect, but behave similarly to the standard ones given above. For example, in the
Kansai dialect, → . ==Other independent words==