English

Imperfect meanings in English are expressed in different ways depending on whether the event is continuous or habitual.

For a continuous action (one that was in progress at a particular time in the past), the past progressive (past continuous) form is used, as in "I was eating"; "They were running fast." However certain verbs that express state rather than action do not mark the progressive aspect (see Uses of English verb forms § Progressive); in these cases the simple past tense is used instead: "He was hungry"; "We knew what to do next."

Habitual (repeated) action in the past can be marked by used to, as in "I used to eat a lot", or by the auxiliary verb would, as in "Back then, I would eat early and would walk to school." (The auxiliary would also has other uses, such as expressing conditional mood.)^[4] However, in many cases the habitual nature of the action does not need to be explicitly marked on the verb, and the simple past is used: "We always ate dinner at six o'clock."

Latin

Conjugation of the imperfect indicative:

Notes:

• The imperfect is signified by the signs ba and ebā.
• The imperfect forms of esse are used as auxiliary verbs in the pluperfect of the passive voice along with perfect passive participles.

French

To form the imperfect for French regular verbs, take the first person plural present tense, the "nous" (we) form, subtract the -ons suffix, and add the appropriate ending (the forms for être (to be), whose "nous" form does not end in -ons, are irregular; they start with ét- but have the same endings). Verbs that terminate in a stem of -cer and -ger undergo minor orthographic changes to preserve the phonetic sound or allophone. Verbs whose root terminates in the letter "i" maintain the letter despite the consecutiveness in the "nous" and "vous" forms.

It is used to express the ideas of habitual actions or states of being; physical and emotional descriptions: time, weather, age, feelings; actions or states of an unspecified duration; background information in conjunction with the passé composé; wishes or suggestions; conditions in "si" clauses; the expressions "être en train de" and "venir de" in the past.

Italian

Conjugation of the imperfect indicative:

Notes:

• Dropping the -re suffix and adding -vo, -vi, -va, -vamo, -vate, and -vano form verbs.
• Although dire and opporre (as all the composite forms of verb porre and dire) may seem irregular, they are a part of a verb family that has stronger roots to Latin equivalents (lat. pōnere/pōnēbam and dīcere/dīcēbam). Other verbs include fare(infinitive)/faccio(present tense)/facevo(imperfect) (lat.facere/facio/faciēbam), bere/bevo/bevevo (bibere/bibo/bibēbam), trarre/traggo/traevo (trahere/traho/trahēbam), durre/duco/ducevo[obs.] (dūcere/dūco/dūcēbam) and all their composite forms..
• There is another imperfect in Italian formed by combining the imperfect of the verb stare (stavo, stavi, stava, stavamo, stavate, stavano) with the gerund. For example, "parlavo" could be said as "stavo parlando". The difference is similar to the difference between "I eat" and "I am eating" in English. However, English does not make this distinction in the imperfect.

Romanian

Conjugation of the imperfect indicative:

Notes:

• The imperfect is formed from the short infinitive form of the verbs (without the -re suffix) combined with the -am, -ai, -a, -am, -ați, and -au endings.
• Short infinitives ending in „-a” (1st conjugation) don't double this letter: e.g. "pleca” in the first person singular is "plecam" and not "plecaam").
• Short infinitives ending in "-i" take the pattern of those ending in "-e" (e.g. dormi becomes dormeam in 1st person imperfect), while short infinitives ending in "-î" take the pattern of those ending in "-a" (e.g. hotărî becomes hotăram in 1st person imperfect).
• There is only one irregular verb in the imperfect: a fi, that is created from the radical era-, instead of fi-.

Spanish

In Spanish, the imperfect can be called the imperfecto or the copretérito. Conjugation of the imperfect indicative:

• There are only three irregular verbs in the imperfect: ir, ser, and ver. Historically, ir — unlike other Spanish "-ir verbs" — failed to drop the -b- of the Latin imperfect. The imperfect of ser is likewise a continuation of the Latin imperfect (of esse), with the same stem appearing in tú eres (thanks to pre-classical Latin rhotacism). The imperfect of ver (veía etc.) was historically considered regular in Old Spanish, where the infinitive veer provided the stem ve-, but that is no longer the case in standard Spanish. In formal language, pronouns "tú" and "vosotros" are replaced by "usted" and "ustedes" (sometimes abbreviated as Ud./Vd. and Uds./Vds.), with the verb conjugated in third person. American Spanish always replaces "vosotros" with "ustedes", switching the verb accordingly. The countries that show the kind of voseo in which "tú" is replaced by "vos" use the same forms as for "tú" in this tense.
• The first person singular and third person singular forms are the same for all verbs; thus, in cases of ambiguity where context is insufficient, a pronoun or subject noun is included for the sake of clarification.

Portuguese

In Portuguese, the imperfect indicative, called "pretérito imperfeito", is quite similar to Spanish:

There are four irregular verbs: "pôr" (to put), "ser" (to be), "ter" (to have) and "vir" (to come). Unlike in Spanish, the verbs "ver" (to see) and "ir" (to go) are regular in the Portuguese imperfect.

Like in Italian, it is also commonly formed by combining the imperfect of the verb estar (estava, estavas, estava, estávamos, estáveis, estavam) with the gerund (for example, "falando", the gerund form of "falar", to speak, to talk). In Brazilian Portuguese, both in informal oral speech and informal written language (for example, online or phone texting), it is more common to use the composite "estava falando" (commonly reduced to "tava falando"), than to use the synthetic "falava", which is more common in formal written forms.

The synthetic pluperfect ("eu falara" "I had spoken") is considered old-fashioned and never used in spoken communication – it is substituted by the composite "eu tinha falado", which is formed with the imperfect form of the verb "ter" (to have) (tinha tinhas tinha tínhamos tínheis tinham) plus the past participle ("falado"). Alternatively, the verb "ter" can be swapped with the imperfect form of the verb "haver" (to have) (havia havias havia haviamos havíeis haviam)

Galician

Similar to the closely related Portuguese, as well as to Spanish, but often called "copretérito" (from co-, same particle found in English "collaboration" and "coexistence", plus "pretérito", which is "past tense", in reference of it being a second past tense that exists along the regular one). Same as with them, in formal usage "ti" and "vós/vosoutros" change to "vostede" and "vostedes" and are followed by the third person. In verbs ended in -aer, -oer, -aír and -oír, the first and second person of the plural show the presence of a diaeresis.

Hindi

Hindi, an Indo-Aryan language, has indicative imperfect tense conjugation only for the verb होना (honā) [to be] and the rest of the verbs lack this conjugation. The indicative imperfect forms of होना (honā) comes from Sanskrit स्थित (stʰita) "standing, situated" which are derived from the PIE root *steh₂- (“to stand”).^[5] The imperfect conjugation is derived from a participle form and hence its conjugations agree only with the number and gender of the grammatical person and not the pronoun itself. So, the grammatically singular pronouns (e.g., मैं ma͠i "I" and तू tū "you" etc.) are assigned the singular imperfect forms (i.e. था thā or थी thī) depending on the gender of the person or the noun they refer to, and the grammatically plural pronouns (e.g. हम ham "we" etc.) are assigned the plural imperfect forms (थे thē and थीं thīm̊). An exception to this is the pronoun तुम (tum) which takes in the plural imperfect form (थे thē) in masculine gender but singular form (थी thī) in feminine gender.

These imperfect conjugations also act as copula to form the imperfect past forms for the three grammatical aspects that Hindi hasː Habitual, Perfective, and Progressive aspects.

Assamese

In Assamese, two imperfect forms are recognisedː present progressive and/or present perfect & past progressive and/or remote past. There is only one periphrastic tense which functions as both the present progressive and present perfect with reference to the setting in which is placed.^{[citation needed]}

Persian

Like all other past tenses, imperfect is conjugated regularly for all verbs. Formation: [preverb] + mi- + past stem + past ending. Conjugation of the imperfect indicative for the first person singular is shown in the table belowː