Past Tense Auxiliaries in Basque

In Brief

Basque normally puts person, number, and past time in an auxiliary (a helping verb). Use the past forms of izan with identity and intransitive verbs, ukan/edun forms with transitive verbs, and egon forms for location or temporary state: joan nintzen “I went,” ikusi nuen “I saw it,” and etxean nengoen “I was at home.” With a transitive verb, the auxiliary can also show whether the direct object is singular or plural: liburua irakurri nuen but liburuak irakurri nituen.

Overview

Most Basque verbs use two pieces: a main verb, which supplies the meaning, and an auxiliary, which carries grammatical information. In Guk dena prestatu genuen (“We prepared everything”), prestatu means “prepare,” while genuen identifies a past transitive action done by “we” to a singular object. This division of labour is much more visible than in English.

At A2, learners often meet a few useful past forms one by one. This B1 topic brings the main system together: the complete standard paradigms of izan, ukan/edun, and egon, including plural direct objects. A paradigm is simply the full set of forms arranged by person, such as “I, you, he/she, we, you all, they.”

English speakers must resist looking for one Basque equivalent of “was” or one unchanged equivalent of “did.” Basque first asks how the participants fit the verb. An intransitive verb has no direct object, as in “we arrived”; a transitive verb acts on a direct object (the person or thing affected), as in “we prepared dinner.” Location and temporary condition commonly use egon. Once you identify that structure, the choice of auxiliary becomes far more predictable.

How It Works

Choose the auxiliary family first

Family	Main job	Typical present clue	Core past examples
izan	identity, classification, and auxiliary of intransitive verbs	naiz, zara, da	nintzen, zinen, zen
ukan/edun	possession and auxiliary of transitive verbs	dut, duzu, du	nuen, zenuen, zuen
egon	location and temporary or current state	nago, zaude, dago	nengoen, zeunden, zegoen

The labels name grammatical families, not always separately spoken infinitives. In everyday compound verb forms, learners chiefly encounter the conjugated auxiliary itself: nuen, zenuen, genuen, and so on.

Complete past paradigm of izan

Use these forms as the verb “be” for identity or classification and as the auxiliary of many intransitive verbs, including joan “go,” etorri “come,” iritsi “arrive,” and jaio “be born.”

Person	Pronoun	Past form	Basic meaning
first singular	ni	nintzen	I was
second singular	zu	zinen	you were
third singular	hura	zen	he, she, or it was
first plural	gu	ginen	we were
second plural	zuek	zineten	you all were
third plural	haiek	ziren	they were

With a noun or description, the auxiliary can stand directly after the complement: Ane irakaslea zen (“Ane was a teacher”). With a lexical main verb, the usual perfective pattern is participle + past auxiliary: etorri zen (“he/she came”), joan ginen (“we went”). A participle is the basic completed-action form used in compound verbs; examples include etorri, joan, ikusi, and prestatu.

Subject pronouns are often omitted because the auxiliary already identifies the person. Berandu iritsi ginen naturally means “We arrived late”; gu is unnecessary unless it adds contrast or emphasis.

Complete past paradigm of ukan/edun: one object

For a transitive action with one singular third-person object—or an uncounted object treated grammatically as singular—use this central set:

Doer	Ergative pronoun	Past auxiliary	Approximate meaning
I	nik	nuen	I had/did it
you	zuk	zenuen	you had/did it
he/she	hark	zuen	he/she had/did it
we	guk	genuen	we had/did it
you all	zuek	zenuten	you all had/did it
they	haiek	zuten	they had/did it

The doer of a transitive verb takes the ergative case (a marking for the doer of a transitive action): nik, zuk, hark, guk, zuek, haiek. The direct object is in the absolutive case (the unmarked role used for a transitive object and an intransitive subject). Compare:

• Ni joan nintzen. — I went. Here ni is the intransitive subject.
• Nik liburua irakurri nuen. — I read the book. Here nik is the transitive doer and liburua is the object.

English “you” hides a distinction that Basque makes. Zinen and zenuen address one person; zineten and zenuten address more than one person.

Plural direct objects

The auxiliary also agrees with the direct object. When the third-person object is plural, use the following forms:

Doer	Singular object	Plural object
I	nuen	nituen
you	zenuen	zenituen
he/she	zuen	zituen
we	genuen	genituen
you all	zenuten	zenituzten
they	zuten	zituzten

Thus Sagarra jan nuen means “I ate the apple,” while Sagarrak jan nituen means “I ate the apples.” The -it- element is a useful clue to a plural object, although it is better to learn each whole form than to assemble it letter by letter.

These tables cover third-person direct objects—the high-frequency core of this concept. If the object is “me,” “you,” or “us,” Basque uses other agreement forms, such as ninduen (“he/she had/saw me”). Those belong to the wider NOR–NORK system discussed under advanced use below.

Complete past paradigm of egon

Egon expresses being somewhere or being in a temporary, current, or resulting condition. Its standard past forms are:

Person	Pronoun	Past form	Basic meaning
first singular	ni	nengoen	I was/stayed
second singular	zu	zeunden	you were/stayed
third singular	hura	zegoen	he/she/it was/stayed
first plural	gu	geunden	we were/stayed
second plural	zuek	zeundeten	you all were/stayed
third plural	haiek	zeuden	they were/stayed

Use these especially with location: Madrilen zeuden (“They were in Madrid”), Non zeunden? (“Where were you?”). They also occur with temporary states: Nekatuta nengoen (“I was tired”) and Kezkatuta zeuden (“They were worried”).

Do not reduce the difference between izan and egon to an absolute “permanent versus temporary” rule. That shortcut helps at first, but construction and meaning matter. Identity and classification normally select izan; physical location normally selects egon. A state viewed as the situation at a particular time also often selects egon.

Aspect: completed, habitual, or ongoing

The past auxiliary identifies past time, but the form of the main verb helps express aspect—how an action unfolds or is viewed.

Pattern	Typical interpretation	Example
participle + past auxiliary	completed event	Liburua irakurri nuen. — I read the book.
-tzen/-ten form + past auxiliary	habitual or repeated past	Egunero irakurtzen nuen. — I used to read every day.
-tzen/-ten ari + egon past	action in progress	Irakurtzen ari nintzen. — I was reading.

In the progressive construction, ari behaves with the izan auxiliary: ari nintzen, ari zinen, ari zen. The location/state forms nengoen, zeunden, and so on are nevertheless the synthetic past forms of egon itself. “Synthetic” means that the verb’s meaning and agreement appear together in one conjugated word.

Negatives and questions

In a neutral affirmative compound verb, the main verb normally precedes the auxiliary: Hori esan zenuen (“You said that”). In a negative clause, ez comes immediately before the conjugated auxiliary, and the auxiliary normally precedes the main verb:

• Ez zenuen hori esan. — You did not say that.
• Ez ginen garaiz iritsi. — We did not arrive on time.
• Ez zeuden etxean. — They were not at home.

Questions do not require an English-style “did.” The same auxiliary remains in the past: Hori esan zenuen? (“Did you say that?”), Non zeunden atzo? (“Where were you yesterday?”).

Examples in Context

Basque	English	Note
Ni ikaslea nintzen garai hartan.	I was a student at that time.	Identity with izan
Haiek Madrilen ziren.	They were in Madrid.	Given example; izan can occur in this copular statement
Atzo berandu iritsi ginen.	We arrived late yesterday.	Intransitive completed event
Zuek elkarrekin joan zineten.	You all went together.	Plural “you”
Zuk hori esan zenuen.	You said that.	One singular object
Guk dena prestatu genuen.	We prepared everything.	Transitive, first-person plural doer
Haiek afaria egin zuten.	They made dinner.	Third-person plural doer
Bi sarrera erosi nituen.	I bought two tickets.	Plural direct object
Anek argazkiak erakutsi zituen.	Ane showed the photos.	Singular doer, plural object
Non zeunden atzo arratsaldean?	Where were you yesterday afternoon?	Location with egon
Gu etxean geunden euria hasi zenean.	We were at home when it started raining.	Past location
Haurrak nekatuta zeuden.	The children were tired.	Temporary state
Lehen goizero kafea hartzen nuen.	I used to have coffee every morning.	Habitual past
Deitu zenidanean, afaria prestatzen ari nintzen.	When you called me, I was preparing dinner.	Action in progress
Ez genituen giltzak aurkitu.	We did not find the keys.	Negative plus plural object

The sentence Haiek Madrilen ziren is grammatical as a copular statement and is part of the concept’s core examples. In ordinary answers to “Where were they?”, Madrilen zeuden is often the more direct location-focused choice. This contrast is worth noticing rather than treating the two forms as freely interchangeable.

Common Mistakes

Using a transitive auxiliary with an intransitive verb

• Wrong: Atzo joan nuen.
• Right: Atzo joan nintzen.
• Why: Joan (“go”) has no direct object here, so it selects the izan auxiliary. Nuen requires a transitive structure with an object.

Forgetting the ergative form of the doer

• Wrong: Ni liburua irakurri nuen.
• Right: Nik liburua irakurri nuen.
• Why: The doer of a transitive verb takes ergative marking. First-person ni therefore becomes nik.

Ignoring plural-object agreement

• Wrong: Nik hiru liburu erosi nuen.
• Right: Nik hiru liburu erosi nituen.
• Why: The object is plural in meaning, so the auxiliary must mark a plural direct object. Compare one liburu bat ... nuen with several liburu ... nituen.

Confusing singular and plural “you”

• Wrong: Zuek prest zinen.
• Right: Zuek prest zineten.
• Why: Zinen addresses one person. With zuek, use plural zineten; in the transitive family, compare zenuen and zenuten.

Keeping affirmative word order after ez

• Wrong: Ez hori esan zenuen.
• Right: Ez zenuen hori esan.
• Why: In the normal negative pattern, ez directly precedes the auxiliary, and the main verb follows it.

Treating izan and egon as interchangeable forms of “was”

• Wrong: Atzo bulegoan nintzen when the intended point is simply your location.
• Right: Atzo bulegoan nengoen.
• Why: For straightforward physical location, egon is the normal choice. Izan has its own copular and event-related uses, so context—not the English word “was” alone—decides.

Usage Notes

Standard Basque commonly omits independent pronouns when the auxiliary already makes the person clear. Genuen identifies “we” as the doer, so guk is added mainly when the subject needs contrast, correction, or emphasis: Guk egin genuen, ez haiek (“We did it, not them”). Case-marked noun phrases remain useful when the identity of the participants would otherwise be unclear.

Basque distinguishes singular zu from plural zuek, even though English uses “you” for both. Historically, zu developed as a respectful form, but in modern standard usage it is the ordinary singular “you.” The older familiar pronoun hi has forms such as hintzen and belongs to hika, an intimate system with additional allocutive agreement. It is socially and regionally sensitive; use the standard zu forms unless you have learned hika in a suitable community and context.

Past forms often appear with time expressions such as atzo (“yesterday”), iaz (“last year”), garai hartan (“at that time”), and lehen (“formerly/used to”). These words clarify the time frame, but the auxiliary itself is already past. Basque does not insert an equivalent of English auxiliary “did” merely to make a question.

Spoken varieties differ in pronunciation and may use regional auxiliary forms. The paradigms in this article are Euskara Batua, Standard Basque, and are the safest forms for writing, formal communication, and broad comprehension.

Beyond the Basics / Advanced Use

The tables above deliberately focus on the most productive core: intransitive forms and transitive forms with third-person singular or plural objects. Full Basque auxiliary agreement can encode more participants. When the direct object is first or second person, forms change: Hark ni ikusi ninduen means “He/she saw me,” while Hark gu ikusi gintuen means “He/she saw us.” The auxiliary is therefore not merely a tense ending; it can function as a compact map of the sentence’s participants.

An indirect object—the recipient or beneficiary, such as “to me” in “She gave it to me”—introduces the NOR–NORI or NOR–NORI–NORK paradigms. For example, eman zidan means “he/she gave it to me.” These dative systems are related to the present topic but should be learned as their own agreement sets rather than guessed from nuen and nintzen.

Past auxiliaries also take clause suffixes. Basque often attaches information to the end of the conjugated form:

Form	Added function	Example meaning
zen	independent past form	he/she was
zela	“that” clause	that he/she was
zenean	time clause	when he/she was
zelako	reason clause	because he/she was
nuen	independent transitive form	I did/had it
nuenean	time clause	when I did/had it

This explains why a familiar auxiliary may look longer inside a relative, temporal, or reported-speech clause. Learn to identify the core past form before the attached ending.

Finally, the completed-versus-habitual contrast is not identical to an English tense chart. Irakurri nuen presents a completed reading event; irakurtzen nuen presents a repeated or ongoing habit; irakurtzen ari nintzen highlights an action underway at a particular moment. Choosing the auxiliary correctly is only one half of accurate past narration—the aspect of the main verb supplies the other half.

Practice Tips

1. Sort before conjugating. Take ten past-tense sentences and label each one “no direct object,” “has a direct object,” or “location/state.” Only then choose izan, ukan/edun, or egon. This prevents English “was/did” from controlling your choice.
2. Drill contrasts, not isolated lists. Say pairs such as joan nintzen / ikusi nuen, liburua erosi nuen / liburuak erosi nituen, and zinen / zineten. A one-word change makes the agreement visible.
3. Retell one day in three layers. First write five completed events, then add one old habit with -tzen nuen, and finally one background action with -tzen ari nintzen. Check every negative for the order ez + auxiliary + main verb.

Related Concepts

• Prerequisite: Past Tense (Simple Past) — introduces the basic idea that the auxiliary carries past tense.
• Useful foundation: Transitive Verb Agreement (NOR-NORK) — explains why transitive auxiliaries agree with both doer and object.
• Useful foundation: Verb Aspect (Habitual and Progressive) — distinguishes completed, habitual, and ongoing viewpoints.
• Next step: Temporal Clauses — uses past forms with endings such as -nean to organize a narrative.
• Next step: Relative Clauses — shows how finite forms such as nuen receive clause endings.