Hindustani (Hindi and Urdu) verbs conjugate according to mood, tense, person, number, and gender. Hindustani inflection is markedly simpler in comparison to Sanskrit, from which Hindustani has inherited its verbal conjugation system (through Prakrit). Aspect-marking participles in Hindustani mark the aspect. Gender is not distinct in the present tense of the indicative mood, but all the participle forms agree with the gender and number of the subject. Verbs agree with the gender of the subject or the object depending on whether the subject pronoun is in the dative or ergative case (agrees with the object) or the nominative case (agrees with the subject).^[1]

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Verbs are morphologically contrastive, leading to the existence of related verb sets divisible along such lines. While the derivation of different verb forms shows patterns, it does reach a level of variegation so as to make it somewhat difficult to outline all encompassing rules. Furthermore, some verb sets may have as many as four to five distinct members; also, the meaning of certain members of given sets may be idiosyncratic.^[10] These below are the verb forms that a verb can have —

1. Intransitive
   1. Involitional — these are actions that cannot be done intentionally.
      1. Dative — these involitional verbs require the subject to be in the dative case.^[11]
      2. Non-dative — these verbs require the subject to be in the nominative case.
   2. Volitional — these are actions that can be intentionally done.^[12]
      1. Ergative — these verbs require the subject to be in the ergative case when the verb is in the perfective aspect.̟
      2. Non-ergative — these verbs always require the subject to be in the nominative case even when the verb is in perfective aspect.
2. Transitive
   1. Direct — the subject itself experiences the action but the subject and the object are not the same
   2. Indirect — the subject imparts the action onto the object, the object is the experiencer of the action by the usually translated into English as "to make (someone/something) verb"
   3. Reflexive — the verb does action on the subject itself, the doer and experiencer of the action is the same subject
   4. Causative — the subject causes the action to happen

Starting from direct transitive verb forms, the other verb stems i.e., intransitive, causative, reflexive, indirect stems are produced according to these following (not exhaustive) assorted rules —

1. Root vowel changeː
   • a → ā
   • u / ū → o
   • i / ī → e
2. Sometimes the root vowel change accompanies the root's final consonant changeː
   • k → c
   • ṭ → r̥
   • l → Ø
3. Suffixation of -ā to form the indirect or reflexive formː
   • Root vowel changeː ū/o → u; e/ai/ā/ī → i
   • Insertion of semivowel l between such vowel-terminating stems
4. Suffixation of -vā (in place of -ā where it would occur) to form the causative verb stem

The meaning each verb in the verb set has is constructed from the direct form of the verb, for example: dekhnā (to see), dikhnā (to be seen), dikhānā (to make someone see; to show), dikhvānā (to cause to see). The table below shows some verbs and its verb set.^[13]

There are four distinguished conjugation sets in Hindustani.^[4] The first person [1P] singular pronoun mãĩ, the second person [2P] singular intimate pronoun tū, the 2P plural familiar pronoun tum, and the 2P plural formal pronoun āp. The 1P plural pronoun ham and the 3P plural conjugations are the same as the conjugations of āp, and the 3P singular conjugations are the same as that of 2P singular pronoun tū. Hindi does not have 3P personal pronouns and instead the demonstrative pronouns (ye "this/these", vo "that/those") double as the 3P personal pronouns when they lack a noun argument.

There are very few irregular verbs. There are three types of irregularities that may occurː

1. Irregular indicative perfect conjugationsː
   • honā - to be; karnā - to do; denā - to give; lenā - to take; pīnā - to drink; jānā - to go
2. Irregular subjunctive conjugationsː
   • honā - to be; lenā - to take; denā - to give; pīnā - to drink; jīnā - to live
3. Irregular imperative conjugationsː
   • lēnā - to take; dēnā - to give; pīnā - to drink; jīnā - to live

There are two types of participles, aspectual participles which mark the aspect and non-aspectual participles which do not mark aspect. In the table below which mentions the different participles present in the language, ɸ denotes the verb root. The verb root ɸ for non-complex verbs is a single root however for complex verbs ɸ is in the form of ɸ1 + ɸ2 where ɸ2 acts like ɸ of the non-complex verbs which is declinable according to the aspect, for example, for the verb karnā ("to do") the root is kar and for the complex verb kar jānā (which is one of the perfective forms of "to do") the root is "kar jā-" where ɸ1 = kar and ɸ2 = jā.

Notes:

• ɸ-(y)ā denotes that when the verb root ɸ ends in a vowel, the consonant -y- is added, else it isn't.
• The participles which do not end in the vowel ā in their masculine singular form are cannot be declined according to gender or number, for example, the oblique infinitive and the progressive participle end in the vowel -e and hence have the same form for all gender and number combinations. Also, usually such participles do not take in the copula after them but instead a verb.
• Infinitive participles always use the dative pronouns as subjects,^[19] while other participles can have the nominative or the dative case pronouns as subjects, depending on the verb used. For example:
  1. mujhe bolnā acchā lagtā hai. = I like to speak. ("bolnā" here is the infinitive participle, and not the infinitive. It agrees in gender and number with the direct object in the sentence. It takes the default masculine form when no object is present.)
  2. ma͠i bolnā pasand kartā hū̃. = I like to speak. ("bolnā" here is the infinitive, and hence it cannot decline according to the gender and number)
  3. mujhe bolne se thakān hotī hai. = I get tired because of speaking.
  4. ma͠i bolne se thak jātā hū̃. = I get tired because of speaking.

As discussed in the above section, there are three aspect marking participles which take in a copula in order to assign a grammatical mood and tense to the aspectual form. There are four verbs which can be used as the copula: honā (to be), rêhnā (to stay), ānā (to come), jānā (to go), and karnā (to do). Each of the four copulas provide a unique nuance to the aspect. The default (unmarked) copula is honā (to be).^[5][4] Below is a table showing the infinitive forms of each of the aspectual forms using different copulas:

The other copulas unlike honā (to be) can also again be put into their aspectul forms and then the copula honā (to be) is used to mark the tense and the mood, hence forming subaspects. However, these copulas cannot be put into all three aspects. It depends on the verb and also the copula itself what grammatical aspects can the copula can be put into. The following two tables show subaspectual forms for each of the three aspects.

¹ When the copula jānā (to go) is used, only transitive and volitional intransitive verbs can be put into the habitual and perfective subaspect. So, *huā jātā honā and *huā gāyā honā are not valid constructions. However, somehow huā jā rahā honā is a valid construction but it means the same as hotā jā rahā honā which is the progressive subaspect of the habitual aspect using the copula jānā (shown below) but just emphasising the rate (shows its faster) at which the action is happening; progressive subaspects of the perfective aspect using jānā (to go) is often just the more emphasised version of the progressive subaspect of the habitual aspect using jānā (to go). marnā (to die) is intransitive but it is a volitional action especially when used metaphorically as in "pizzā khāne ke liye marā jā rahā hū̃" = "I am dying to eat a pizza". Other commonly used voliational usage of marnā (to die) is for e.g. "dying in a videogame".

² The progressive subaspect of the perfective aspect can also use the copula rêhnā (to stay, remain) and it can be again conjugated into aspectual participle forms, hence forming what could be called a sub-sub-aspect. An example using habitual sub-subaspectː "jab bhī uske sāth bāhar jātī hū̃ vo marā jā rahā rêhtā hai pizzā khāne ke liye" = "Whenever I go out with him he always is (nuanceː I always find him) dying to eat a pizza". This sentence combines and mixes the nuances of all the three, perfective (main), progressive (sub), and habitual (subsub), aspects on the same verb marnā (to die).

Compound verbs, a highly visible feature of Hindustani grammar, consist of a verbal stem plus a light verb. The light verb (also called "subsidiary", "explicator verb", and "vector"^[20]) loses its own independent meaning and instead "lends a certain shade of meaning"^[21] to the main or stem verb, which "comprises the lexical core of the compound".^[20] While almost any verb can act as a main verb, there is a limited set of productive light verbs.^[22] Shown below are prominent such light verbs, with their independent meaning first outlined, followed by their semantic contribution as auxiliaries. Finally, having to do with the manner of an occurrence, compounds verbs are mostly used with completed actions and imperatives, and much less with negatives, conjunctives, and contexts continuous or speculative. This is because non-occurrences cannot be described to have occurred in a particular manner.^[23] The auxiliaries when combined with the main verb provides an aspectual sense to the main verb it modifies. Light verbs such as jānā "to go", ānā "to come", cuknā when combined with the main verb give the formed compound verb a perfective aspect, while retaining the original meaning of the main verb.

The first three light verbs in the above table are the most common of auxiliaries, and the "least marked", or "lexically nearly colourless".^[25] The nuance conveyed by an auxiliary can often be very subtle, and need not always be expressed with different words in English translation. lenā (to take) and denā (to give), transitive verbs, occur with transitives, while intransitive jānā (to go) occurs mostly with intransitives; a compound of a transitive and jānā (to go) will be grammatically intransitive as jānā (to go) is.

Hindustani is an aspectually split ergative language, with the ergative case marker, -ne, appearing on the subject of the transitive perfective clauses.^[32] A standard ergative construction is shown below — the verb is a transitive perfective participle, the subject carries the ergative case marker -ne, the object is unmarked and the participle agrees in gender with the object.

The light verb construction exemplified in (b) above has been has been studied extensively in Hindi linguistics. It is a two-verb sequence (referred to here as V1–v2) [bec = V1, lī = v2 ] in which the first verb (V1) is morphologically the bare stem and the second verb (v2) carries the usual clausal inflection. The V1 functions as the main verb, providing the bulk of meaning/thematic information, and the v2 is "relatively" light. This "light" v2 does provide certain subtle semantic information, mostly (though not entirely) aspectual/directional in nature.^[32]