Navajo grammar

Navajo is a "verb-heavy" language – it has a great preponderance of verbs but relatively few nouns. In addition to verbs and nouns, Navajo has other elements such as pronouns, clitics of various functions, demonstratives, numerals, postpositions, adverbs, and conjunctions, among others. Harry Hoijer grouped all of the above into a word-class he called particles. Navajo has no words that would correspond to adjectives in English grammar: verbs provide the adjectival functionality.

Verbs

The key element in Navajo is the verb. Verbs are composed of an abstract stem to which inflectional or derivational prefixes are added. Every verb must have at least one prefix. The prefixes are affixed to the verb in a specified order.
The Navajo verb can be sectioned into different components. The verb stem is composed of an abstract root and an often fused suffix. The stem together with a "classifier" prefix make up the verb theme. The thematic prefixes are prefixes that are non-productive, have limited derivational function, and no longer have a clearly defined meaning. Examples of thematic prefixes include the archaic ' prefix, which only occurs on the verb stem ' meaning "to talk" as in "he's talking". The theme is then combined with derivational prefixes that in turn make up the verb base. Finally, inflectional prefixes are affixed to the base – producing a complete Navajo verb.

Verb template

The prefixes that occur on a Navajo verb are added in specified more or less rigid order according to prefix type. This type of morphology is called a position class template. Below is a table of a recent proposal of the Navajo verb template. A given verb does not have a prefix for every position. In fact, most Navajo verbs are not as complex as the template might suggest: the maximum number of prefixes is around eight.
The Navajo verb is composed of a verb stem and a set of prefixes. The prefixes can be divided into a conjunct prefix set and disjunct prefix set. The disjunct prefixes occur on the outer left edge of the verb. The conjunct prefixes occur after the disjunct prefixes, closer to the verb stem. Two types of prefixes can be distinguished by their different phonological behavior.
The prefix complex may be subdivided into 11 positions, with some of the positions having even further subdivisions:
Although prefixes are generally found in a specific position, some prefixes change order by the process of metathesis. For example, prefix ' usually occurs before ', as in:
However, when ' occurs with the prefixes ' and ', the ' metathesizes with ', leading to an order of ', as in:
instead of the expected * .
Although the verb template model of analysis has been traditionally used to describe the Navajo verb, other analyses have been proposed by Athabascanists.

Pronominal inflection

Navajo verbs have pronominal prefixes that mark both subjects and objects. The prefixes can vary in certain modes, particularly the perfective mode. The prefixes are inflected according to person and number. The basic subject prefixes are listed in the table below:
The subject prefixes occur in two different positions. The first and second subject prefixes occur in position 8 directly before the classifier prefixes. The fourth, indefinite, and "space" subject prefixes are known as "deictic subject pronouns" and occur in position 5. The third person subject is marked by the absence of a prefix, which is usually indicated with a zero prefix -∅- in position 8. The object prefixes can occur in position 4 as direct objects, in position 1a as "null postpositions", or in position 0 as the object of postpositions that have been incorporated into the verb complex.
The fourth person subject prefix ji- is a kind of obviative third person. It refers primarily to persons or personified animals. It has a number of uses including:

referring to the main character in narratives
distinguishing between two third person referents
referring politely or impersonally to certain socially-distant individuals

When used as an impersonal, it may be translated into English as "one" as in ' "one can cut one's hand playing with knives". The "space" prefix can be translated as "area, place, space, impersonal it" as in ' "the area/place is white" and ' "it is raining". The prefix has two forms: ' and ' with ' having derived forms such as ' and '.
An example paradigm for "to freeze" showing the subject prefixes:

Classifiers (transitivity prefixes)

The "classifiers" are prefixes of position 9 that affect the transitivity of the verb, in that they are valence and voice markers. Calling them "classifiers" is a misnomer, however, as they do not classify anything and are not related to the classificatory verb stems. There are four classifiers:

classifier	description	example
	The -∅- classifier is the absence of a prefix, which is usually indicated by a null morpheme.	-
	The ' classifier is a causative-transitivizing prefix of active verbs. It often can transitivize an intransitive -∅- verb.
	The ' classifier occurs in most passive, mediopassive, reflexive, and reciprocal verbs that are derived from verbs with a -∅- classifier.
	The ' occurs in most passive, mediopassive, reflexive, and reciprocal verbs that are derived from verbs with a ' classifier.

Some verbs can occur with all four classifier prefixes:' "it lies in position"

' "it was taken up & out " ' "I keep a roundish object in position"
' "I have my head in position"

In other verbs, the classifiers do not mark transitivity and are considered thematic prefixes that simply are required to occur with certain verb stems.

Modes, aspects and tenses

Navajo has a large number of aspectual, modal, and tense distinctions that are indicated by verb stem alternations often in combination with a range of prefixes. These are divided into seven "modes" and approximately twelve aspects and ten subaspects. Each Navajo verb generally can occur in a number of mode and aspect category combinations.

Modes

Navajo has the following verb modes:

Imperfective – an incomplete action; can be used in past, present, or future time frames
Perfective – a complete action; usually signifying the past tense but also applied to future states
[Continuous and Continuous and progressive aspects|progressive aspects|Progressive] – ongoing action; unlike the imperfective, the focus is more on the progression across space or time than incompleteness
Future – a prospective action, analogous to the future tense
Usitative – a usual or typical action
Iterative – a recurrent or repetitive action; often used interchangeably with the usitative
Optative – a potential or desired action, similar to the subjunctive mood of Indo-European languages

The modes above may have up to five distinct verb stem forms. The progressive and future modes share the same stem form as do the usitative and iterative modes. The optative mode usually has the same verb stem as the imperfective mode, although for some verbs the stem forms differ. For example, the verb meaning "to play, tease" has the following five stem forms for the seven modes:

Mode	Stem Form
Imperfective
Perfective
Progressive/Future
Usitative/Iterative
Optative

Imperfective

The imperfective indicates an event/action that has begun but remains incomplete. Although this mode does not refer to tense, it can usually be translated into English as a present tense form: ' "I'm going/coming", ' "I'm eating ". With the addition of adverbials, the imperfective can be used for events/actions in the past, present, or future. The mode is used in the second person for immediate imperatives. The imperfective mode has a distinct imperfective stem form and four different mode-aspect prefix paradigms:

with a ' terminative prefix in position 7 as in ' "I'm in the act of arriving."
with a ' stative prefix in position 7 as in ' "I'm in the act of placing a SRO " in ' "I'm in the act of placing a SRO up".
with no prefix in position 7, usually identified as a ' prefix, as in ' "I'm crying."
with either a ' transitional or semelfactive prefix in position 6.

Perfective

The perfective indicates an event/action that has been completed. When referring to past situations, it usually corresponds to English simple past: ' "I went/came/arrived", ' "I ate ". However, since the perfective mode is not a tense, it can be used to refer non-past actions, such as the future. The perfective mode has a distinct perfective stem form and four different prefix paradigms:

with a ' perfective prefix with a high tone in position 7 as in ' "I scratched it."
with a ' terminative prefix with a high tone in position 7 as in ' "I arrived."
with a ' stative prefix with high tone in position 7 as in ' "I roasted it."
with a ' transitional prefix in position 6 as in ' "I stood up."

Progressive and future

The progressive indicates an incomplete event/action that is ongoing without reference to the beginning or end of the event/action. This mode may be translated into English as BE + VERB-ing + "along": ' "I'm going/walking along", ' "I'm carrying it along".
The future mode is primarily a future tense – indicating a prospective event/action: ' "I'll go/come", ' "I'll eat ". The progressive mode has a ' progressive prefix, the future has a ' inceptive prefix and the progressive prefix.

Usitative

The usitative indicates a repetitive event/action that takes place customarily: ' "I usually go", ' "I always drink ". The iterative is a frequentative indicating a recurrent event/action that takes place repeatedly and customarily:
The iterative is distinguished from the usitative by a ' repetitive prefix and also sometimes by a ' or classifier prefix.

Optative

The optative indicates a positive or negative desire or wish. The mode is used with the addition of adverbial particles that follow the verb, such as ' and ': ' "I wish it would rain", ' "I hope it doesn't rain". With punctual verbs, the optative mode can be used to form a negative imperative: "don't look at me!". In certain adverbial frames, the optative indicates positive or negative potential.

Aspects and subaspects

The primary aspects:

Momentaneous – an action that takes place at a specific point in time
Continuative – an action that covers an indefinite timeframe, without a specific beginning, goal, or even temporal direction
Durative – similar to the continuative, but not covering locomotion verbs
Conclusive – similar to the durative, but emphasizing the completed nature of the action when in the perfective mode
Repetitive – an action that is repeated in some way, dependent on the sub-aspect and sub-sub-aspect type used
Semelfactive – an action that is distinguished from a connected group or series of actions
Distributive – an action that occurs among a group of targets or locations
Diversative – an action that occurs "here and there", among an unspecified group of targets or locations
Reversative – an action involving change in physical or metaphorical direction
Conative – an action the subject attempts to perform
Transitional – an action involving transition from one status or form to another
Cursive – an action of moving in a straight line in space or time

The subaspects:

Completive – event/action simply takes place
Terminative – stopping of action
Stative – sequentially durative and static
Inceptive – beginning of action
Terminal – inherently terminal action
Prolongative – arrested beginning or ending of action
Seriative – interconnected series of successive separate & distinct acts
Inchoative – focus on beginning of non-locomotion action
Reversionary – return to previous state/location
Semeliterative – single repetition of event/action

Navajo modes co-occur with various aspects. For example, the verb "rain falls" can occur in the perfective mode with the momentaneous and distributive aspects: ', '. As with the modes, different aspects have different stem forms even when in the same mode, as seen with the previous "rain falls" perfective stems. Thus, a given verb has a set of stem forms that can be classified into both a mode and an aspect category. Verb stem paradigms of mode and aspect are given below for two different verbs:

	Imperfective	Perfective	Progressive- Future	Usitative- Iterative	Optative
Momentaneous
Transitional
Continuative, Conclusive
Semelfactive
Repetitive		–	–	–	–
Conative

	Imperfective	Perfective	Progressive- Future	Usitative- Iterative	Optative
Momentaneous, Diversative, Distributive
Continuative
Conclusive
Semelfactive
Repetitive		–	–	–	–
Conative		–	–	–	–
Cursive	–	–		–	–

As can be seen above, some aspect and mode combinations do not occur depending mostly upon the semantics of the particular verb. Additionally, some aspects do not occur at all with a particular verb. The patterns of verb stem alternations are very complex although there is a significant amount of homophony. A particularly important investigation into this area of the Navajo verb is Hardy.

Classificatory verbs

Navajo has verb stems that classify a particular object by its shape or other physical characteristics in addition to describing the movement or state of the object. Athabaskan linguistics identifies these as classificatory verb stems and usually identifies them with an acronym label. The eleven primary classificatory "handling" verb stems appear listed below :

Classifier +Stem	Standard name	Acronym	Contexts of use
	Solid Roundish Object	SRO	bottle, ball, boot, box, etc.
	Load, Pack, Burden	LPB	backpack, bundle, sack, saddle, etc.
	Non-Compact Matter	NCM	bunch of hair or grass, cloud, fog, etc.
	Slender Flexible Object	SFO	rope, mittens, socks, pile of fried onions, etc.
	Slender Stiff Object	SSO	arrow, bracelet, skillet, saw, etc.
	Flat Flexible Object	FFO	blanket, coat, sack of groceries, etc.
	Mushy Matter	MM	ice cream, mud, slumped-over drunken person, etc.
	Plural Objects 1	PLO1	eggs, balls, animals, coins, etc.
	Plural Objects 2	PLO2	marbles, seeds, sugar, bugs, etc.
	Open Container	OC	glass of milk, spoonful of food, handful of flour, etc.
	Animate Object	ANO	microbe, person, corpse, doll, etc.

To compare with English, Navajo has no single verb that corresponds to the English word to give. To say the equivalent of Give me some hay!, the Navajo verb ' must be used, while for Give me a cigarette! the verb ' must be used. The English verb to give is expressed by eleven different verbs in Navajo, depending on the characteristics of the given object.
In addition to defining the physical properties of the object, primary classificatory verb stems also can distinguish between the manner of movement of the object. The stems may then be grouped into three different categories:

handling – movement of an object by continuing physical contact throughout the movement
propelling – movement of an object by propulsion
free flight – movement of a subject of its own without causative agent

Using an example for the solid roundish object category, Navajo has:

' "to handle "
' "to throw "
"to move independently "

Alternation (animacy)

Like most Athabaskan languages, Navajo shows various levels of animacy in its grammar, with certain nouns taking specific verb forms according to their rank in this hierarchy. For instance, nouns can be ranked by animacy on a continuum from most animate to least animate :
humans/lightning → infants/big animals → midsize animals → small animals → insects → natural forces → inanimate objects/plants → abstractions
Generally, the most animate noun in a sentence must occur first while the noun with lesser animacy occurs second. If both nouns are equal in animacy, then either noun can occur in the first position. So, both example sentences and are correct. The ' prefix on the verb indicates that the 1st noun is the subject and ' indicates that the 2nd noun is the subject.
But example sentence sounds wrong to most Navajo speakers because the less animate noun occurs before the more animate noun:
To express this idea requires that the more animate noun occur first, as in sentence :
Note that although sentence and are translated into English with a passive verb, in Navajo it is not passive. Passive verbs are formed by certain classifier prefixes that occur directly before the verb stem in position 9. The prefixes do not mark sentences as active or passive, but as direct or inverse.

Nouns

Many concepts expressed using nouns in other languages appear as verbs in Navajo. The majority of true nouns are not inflected for number, and there is no case marking. Noun phrases are often not needed to form grammatical sentences due to the informational content of the verb.
There are two main types of nouns in Navajo:

simple nouns and
nouns derived from verbs

The simple nouns can be distinguished by their ability to be inflected with a possessive prefix, as in

Deverbal nouns

Deverbal nouns are verbs that have been nominalized with a nominalizing enclitic or converted into a noun through zero derivation.
Converted deverbal nouns include ' "exit, doorway" and ' "Phoenix, Arizona". When used as verbs, ' may be translated into English as "something has a path horizontally out" and ' as "place/space is hot".
Deverbal nouns can potentially be long and complex, such as:

Number

Most nouns are not inflected for number. Plurality is usually encoded directly in the verb through the use of various prefixes or aspects, though this is by no means mandatory. In the following example, is used with the plural prefix and switches to the distributive aspect.

Possession

Possession in Navajo is expressed with personal pronoun prefixes:
Most of the time, these prefixes take a low tone, but in some nouns and postpositions, the final syllable of the prefix takes a high tone, such as ' "my hand," ' "our/your hand."
The prefixes are also used when the possessor in a possessive phrase is a noun, as in:
Navajo marks inalienable possession for certain nouns – relatives, body parts, homes and dens. These nouns can only appear with a possessive prefix, as in ' "my mother." If one wishes to speak of mothers in general, the 3rd person indefinite prefix ' "someone's" is used, .

Postpositions

Navajo uses a number of postpositions where European languages tend to favor prepositions; thus, all spatial and most other relations such as under, on, or above are expressed by using the possessive prefix in combination with a postposition. All postpositions are inalienable, meaning that a prefix or fusion with a true noun is mandatory.
Examples include:
These can be combined with all prefixes to construct forms such as . Occasionally, postpositions are fused with true nouns to form a single word, such as Dinétah.

Numerals

Navajo uses a decimal numeral system. There are unique words for the cardinal numbers 1–10. The numerals 11–19 are formed by adding an additive "plus 10" suffix ' to the base numerals 1–9. The numerals 20–100 are formed by adding a multiplicative "times 10" suffix ' to the base numerals 2–10.
In the compound numerals, the combining forms of the base numerals have irregular vowel and consonants changes. The numeral "1" has three forms:'

The combining form ' is used in the compound ' "11". The numeral ' loses the final ' consonant while the final vowel in ' is shortened when the ' "+10" suffix is added. The suffix loses its initial ' becoming ' when added to ' "5". Several changes occur when the ' suffix is added involving a loss of the final consonant or a reduction in vowel length:

' → '
' → '
' → '
' → '
' → '
' → '
' → '
' → '
' → '

For the cardinal numerals higher than 20 between the multiples of 10, there are two types of formations. The numerals 21–29 and 41–49 are formed by suffixing the ones digit to the tens digit, as in:
Here the ' suffix appears in the combining form '. The combining form ' "1" is used as well:
The other numerals are formed by placing ' "and in addition to it" between the tens digit and the ones digit, as in:
The numerals 41–49 may also be formed in this manner:
or
The cardinal numerals 100–900 are formed by adding the multiplicative enclitic ' to the base numerals 1–9 and adding the word for "hundred" ', as in:
The base numerals with a high tone in the last syllable change to a falling tone before '.
For the thousands, the word ' is used in conjunction with ':' "one thousand"

' "two thousand"

The word for "million" is formed by adding the stem ' "big" to ': ' "million" as in:

' "one million" "two million"