Haben vs. Sein as Auxiliary Verbs in German

Introduction

To form the Perfekt — the past tense you will use most often in spoken German — every verb needs a helper. That helper is called an auxiliary verb (Hilfsverb), and in German there are exactly two choices: haben (to have) or sein (to be). Getting this choice right is one of the most important skills in German, and getting it wrong is one of the most common mistakes learners make at every level.

This lesson builds on your knowledge of basic verb conjugation (Basic Verb Conjugation), the present tense of regular and irregular verbs (Present Tense Irregular Verbs), and personal pronouns (Personal Pronouns and Possessive Adjectives). You will learn the exact rules for choosing haben or sein, how to form the past participle, the complete conjugation of both auxiliaries in the present tense, and how to build a full Perfekt sentence. With clear decision rules, memorable examples, 15 real-life sentences, pronunciation guidance, cultural insights, and 12 exercises, you will confidently choose the right auxiliary every time.

Why This Choice Matters So Much

In English, the present perfect always uses have: I have eaten, I have gone, I have slept. German splits this into two groups. Choosing the wrong auxiliary — Ich habe gegangen instead of Ich bin gegangen — is immediately noticeable to any German speaker and marks a sentence as fundamentally incorrect, even if everything else is right. Mastering this choice is therefore one of the highest-return investments you can make as a learner of German.

The good news: the rule is learnable, logical, and consistent. Unlike many areas of German grammar, the haben/sein distinction follows a clear pattern once you understand the underlying principle.

How the Perfekt Is Built

Before looking at the choice between haben and sein, it helps to see the full Perfekt structure clearly. Every Perfekt sentence has exactly two verb parts:

The conjugated auxiliary (haben or sein) in second position in the sentence.
The past participle (Partizip II) of the main verb at the very end of the clause.

Subject	Auxiliary (position 2)	Rest of sentence	Past participle (end)
Ich	habe	ein Buch	gelesen.
Er	ist	nach Berlin	gefahren.
Wir	haben	Pizza	gegessen.
Sie	ist	früh	aufgestanden.

The auxiliary is always conjugated to match the subject. The past participle never changes its form — it always goes to the end and stays the same regardless of gender, number, or case.

Conjugation of Haben and Sein in the Present Tense

Both auxiliaries are irregular and must be memorised. You already know these verbs in their role as full verbs (Ich habe ein Auto — I have a car; Ich bin müde — I am tired). As auxiliaries, they are conjugated in exactly the same way.

Pronoun	haben (to have)	sein (to be)
ich	habe	bin
du	hast	bist
er / sie / es	hat	ist
wir	haben	sind
ihr	habt	seid
sie / Sie	haben	sind

Forming the Past Participle (Partizip II)

The past participle is the second verb element at the end of every Perfekt sentence. Its formation depends on whether the verb is regular (weak) or irregular (strong).

Regular Verbs: ge- + stem + -t

Infinitive	Past participle	Example sentence
machen (to do/make)	gemacht	Ich habe das gemacht. (I did that.)
kaufen (to buy)	gekauft	Sie hat ein Buch gekauft. (She bought a book.)
spielen (to play)	gespielt	Wir haben gespielt. (We played.)
wohnen (to live)	gewohnt	Er hat dort gewohnt. (He lived there.)
lernen (to learn)	gelernt	Du hast viel gelernt. (You learned a lot.)

Irregular Verbs: ge- + changed stem + -en

Irregular verbs often change their stem vowel and always end in -en. These must be memorised individually.

Infinitive	Past participle	Example sentence
essen (to eat)	gegessen	Ich habe Pizza gegessen.
trinken (to drink)	getrunken	Er hat Wasser getrunken.
schreiben (to write)	geschrieben	Sie hat einen Brief geschrieben.
fahren (to drive/travel)	gefahren	Er ist nach Hause gefahren.
gehen (to go)	gegangen	Wir sind spazieren gegangen.
kommen (to come)	gekommen	Sie ist spät gekommen.
schlafen (to sleep)	geschlafen	Das Baby hat gut geschlafen.
lesen (to read)	gelesen	Ich habe das Buch gelesen.

Verbs with Inseparable Prefixes: No ge-

Verbs beginning with the inseparable prefixes be-, ge-, er-, ver-, zer-, ent-, emp-, miss- do not add ge- to their past participle. The prefix already occupies that slot.

Infinitive	Past participle	Example
besuchen (to visit)	besucht	Ich habe meine Oma besucht.
verstehen (to understand)	verstanden	Er hat die Aufgabe verstanden.
bezahlen (to pay)	bezahlt	Sie hat die Rechnung bezahlt.
erzählen (to tell/narrate)	erzählt	Er hat eine Geschichte erzählt.

Verbs Ending in -ieren: No ge-

Verbs ending in -ieren (mostly loanwords) also never take ge- and always end in -t.

Infinitive	Past participle
studieren (to study)	studiert
telefonieren (to phone)	telefoniert
fotografieren (to photograph)	fotografiert

The Core Rule: When to Use Haben, When to Use Sein

This is the heart of the lesson. The choice comes down to two questions you ask about the main verb. If the answer to either question is yes, the verb uses sein. If the answer to both is no, the verb uses haben.

Question 1: Does the verb express movement from one place to another?

Verbs that describe directed movement — travelling, going, arriving, departing — use sein. The movement must be from point A to point B; aimless movement or movement without change of location does not count.

Verb	Meaning	Auxiliary	Example
gehen	to go	sein	Ich bin in die Stadt gegangen.
fahren	to drive / travel	sein	Er ist nach München gefahren.
fliegen	to fly	sein	Sie ist nach London geflogen.
kommen	to come	sein	Wir sind früh gekommen.
laufen	to run / walk	sein	Er ist schnell gelaufen.
reisen	to travel	sein	Sie ist durch Europa gereist.
schwimmen	to swim	sein (directed)	Er ist über den See geschwommen.
wandern	to hike	sein	Wir sind in den Bergen gewandert.
ankommen	to arrive	sein	Der Zug ist angekommen.
abfahren	to depart	sein	Der Bus ist abgefahren.
zurückkommen	to return / come back	sein	Sie ist zurückgekommen.

Question 2: Does the verb express a change of state?

Verbs that describe a transition from one state to another — something beginning, ending, growing, dying, waking, falling — use sein. The subject undergoes a transformation; it is in a fundamentally different condition after the event than before.

Verb	Meaning	What changes	Example
aufwachen	to wake up	asleep → awake	Ich bin früh aufgewacht.
einschlafen	to fall asleep	awake → asleep	Das Kind ist eingeschlafen.
aufstehen	to get up / stand up	lying/sitting → standing	Sie ist um 7 Uhr aufgestanden.
sterben	to die	alive → dead	Der alte Hund ist gestorben.
werden	to become	state A → state B	Er ist Arzt geworden.
wachsen	to grow	smaller → larger	Die Pflanze ist gewachsen.
schrumpfen	to shrink	larger → smaller	Der Pullover ist geschrumpft.
passieren	to happen	not-happened → happened	Was ist passiert?
gelingen	to succeed	not-done → done successfully	Es ist mir gelungen.

The Two Mandatory Exceptions: bleiben and sein

Two verbs use sein as their auxiliary even though they express neither movement nor a change of state. They must simply be memorised as fixed exceptions.

Verb	Meaning	Auxiliary	Example
bleiben	to stay / remain	sein	Wir sind zu Hause geblieben. (We stayed at home.)
sein	to be	sein	Er ist in Berlin gewesen. (He was in Berlin.)

bleiben is particularly important because it is the logical opposite of movement verbs — you would expect haben, but it takes sein. Think of it as the other side of the coin: if gehen (to go) takes sein, so does bleiben (to stay).

Everything Else Uses Haben

If a verb does not express directed movement, does not express a change of state, and is not bleiben or sein, it uses haben. This is the default. The haben group is much larger than the sein group and includes:

All transitive verbs — verbs that take a direct object (accusative): essen, trinken, kaufen, lesen, schreiben, sehen, hören, kennen, lieben, öffnen.
All reflexive verbs: sich freuen, sich waschen, sich erinnern.
All modal verbs: müssen, können, wollen, sollen, dürfen, mögen.
Most intransitive verbs that express activity without directed movement or state change: schlafen, arbeiten, warten, lachen, weinen, regnen, schneien.

The Decision Tree

When choosing the auxiliary for any verb, work through these questions in order:

Is the verb sein or bleiben? → sein.
Does the verb express directed movement (from A to B)? → sein.
Does the verb express a change of state (before/after transformation)? → sein.
Does the verb take a direct object (is it transitive)? → haben.
None of the above apply? → haben (default).

The Important Nuance: Some Verbs Can Use Either

A small number of verbs switch auxiliary depending on how they are used. The most important examples are fahren, schwimmen, and fliegen. When used intransitively (no direct object, expressing directed movement), they take sein. When used transitively (with a direct object, expressing the action of driving/piloting something), they take haben.

Sentence	Auxiliary	Why
Er ist nach Hamburg gefahren. (He drove to Hamburg.)	sein	Directed movement, no object.
Er hat den Lkw gefahren. (He drove the lorry.)	haben	Transitive — den Lkw is the direct object.
Sie ist über den Kanal geschwommen. (She swam across the channel.)	sein	Directed movement, no object.
Er hat die 200 Meter geschwommen. (He swam the 200 metres.)	haben	Transitive — the distance is treated as an object.

Quick-Reference Summary Table

Uses sein	Uses haben
Directed movement (gehen, fahren, fliegen, kommen, laufen, reisen…)	All transitive verbs (essen, kaufen, lesen, sehen, schreiben…)
Change of state (aufwachen, einschlafen, aufstehen, sterben, werden, wachsen…)	All reflexive verbs (sich freuen, sich waschen…)
bleiben (to stay)	All modal verbs (müssen, können, wollen…)
sein (to be)	Intransitive verbs with no movement / state change (schlafen, arbeiten, warten, lachen…)

Pronunciation Guide

habe: HAH-be — the h is clearly pronounced at the start; the final -e is a soft schwa, never clipped. Ich habe gegessen (ISH HAH-be ge-GES-en).
hat: HAT — short vowel, the t is crisp. Er hat geschlafen (AIR HAT ge-SHLAH-fen).
haben: HAH-ben — used for wir and sie/Sie. Do not confuse with habt (HAHPT) for ihr.
bin: BIN — short i. Ich bin gegangen (ISH BIN ge-GANG-en).
ist: IST — short i, the st cluster is clear. Er ist gefahren (AIR IST ge-FAH-ren).
sind: ZINT — the d at the end is devoiced to a t sound. Wir sind geflogen (VEER ZINT ge-FLOH-gen).
ge- prefix: always unstressed — ge-MACH-t, ge-GES-sen, ge-FAHR-en. The stress falls on the stem, never on ge-.

Audio Tip: Click audio icons to hear complete Perfekt sentences with both auxiliaries — pay attention to how bin/ist/sind versus habe/hat/haben sound in the second position of the sentence.

Cultural Insights

The Perfekt is the spoken past: In everyday German conversation — especially in southern Germany, Austria, and Switzerland — the Perfekt is the standard way to talk about the past. Was hast du gestern gemacht? Ich bin ins Kino gegangen und habe einen Film gesehen. (What did you do yesterday? I went to the cinema and watched a film.) Getting the auxiliary right is therefore not just a grammar exercise — it directly affects how naturally you sound in real conversation.
Regional variation: In northern Germany and in formal writing, the Präteritum (ich ging, ich aß) is more common for narration. But haben and sein are still needed as auxiliaries for the Plusquamperfekt (past perfect) and the Futur II, so the distinction matters at every level.
Children learning German: Native German children make the same haben/sein mistakes as learners — Ich habe gegangen is a typical error for a German-speaking four-year-old. Hearing this same mistake from adult learners is therefore very noticeable, since native speakers outgrow it by age five or six.

Common Mistakes

Mistake 1: Ich habe gegangen. (using haben with a movement verb).
- Fix: gehen expresses directed movement. It takes sein. Correct: Ich bin gegangen. This is the single most common error with auxiliaries — treat sein + gegangen as a fixed phrase to memorise.
Mistake 2: Ich bin geschlafen. (using sein with a non-movement, non-change verb).
- Fix: schlafen describes a state — being asleep — not a change into or out of a state, and not directed movement. It takes haben. Correct: Ich habe geschlafen. Contrast with einschlafen (to fall asleep) — the transition into sleep — which does take sein: Ich bin eingeschlafen.
Mistake 3: Wir sind geblieben zu Hause. (wrong word order — past participle not at the end).
- Fix: The past participle always goes to the very end of the clause. Correct: Wir sind zu Hause geblieben.
Mistake 4: Er hat geworden Arzt. (using haben with werden and wrong participle position).
- Fix: werden expresses a change of state and takes sein. Correct: Er ist Arzt geworden.
Mistake 5: Sie hat nach Berlin gefahren. (using haben instead of sein for intransitive fahren).
- Fix: When fahren has no direct object and expresses a journey, it takes sein. Correct: Sie ist nach Berlin gefahren. If she were driving something — Sie hat das Auto gefahren — then haben would be correct.
Nuance 1: laufen and schwimmen can be tricky. When they mean directed movement (running somewhere, swimming across something), they take sein: Er ist zum Supermarkt gelaufen. When they describe the activity in place — in a sports context where the distance or time is the focus — some speakers use haben: Sie hat heute eine Stunde geschwommen. In practice, sein is the safer and more widely correct choice for both verbs in most contexts.
Nuance 2: The verb fahren paired with a vehicle as subject (not as object) always takes sein, even though a vehicle is involved: Der Zug ist abgefahren (The train departed). This is because the train itself is performing directed movement, not driving something else.

Practice Scenarios

Telling someone about your day: Heute bin ich früh aufgestanden und habe gefrühstückt. Dann bin ich in die Stadt gefahren und habe eingekauft. Am Abend haben wir zusammen gegessen und einen Film gesehen. (Today I got up early and had breakfast. Then I drove into town and did some shopping. In the evening we ate together and watched a film.)
Talking about a trip: Letzten Sommer sind wir nach Spanien geflogen. Wir haben viel geschwommen und sind jeden Tag am Strand gewandert. Das Essen war fantastisch — ich habe jeden Tag Paella gegessen! (Last summer we flew to Spain. We swam a lot and hiked on the beach every day. The food was fantastic — I ate paella every day!)
Reporting news about someone: Hast du gehört? Anna ist Ärztin geworden! Sie hat gestern ihr Examen bestanden. Alle Freunde sind zu ihrer Party gekommen und wir haben bis Mitternacht gefeiert. (Have you heard? Anna has become a doctor! She passed her exam yesterday. All her friends came to her party and we celebrated until midnight.)

Step-by-Step Practice Guide

Memorise the core sein-verbs as a list: Treat the most common sein-verbs as a fixed set to learn: gehen, kommen, fahren, fliegen, laufen, reisen, wandern, ankommen, abfahren, aufwachen, einschlafen, aufstehen, sterben, werden, wachsen, bleiben, sein. Everything else is almost certainly haben.
Apply the two-question test: For every unfamiliar verb, ask: (1) Does it express movement from A to B? (2) Does it express a change of state? If yes to either, use sein.
Practise full Perfekt sentences: Do not practise the auxiliary in isolation. Always build the full sentence: subject + auxiliary (conjugated) + rest + past participle at the end.
Contrast pairs: Practise contrastive pairs that capture the key distinctions — schlafen (haben) vs. einschlafen (sein); fahren ohne Objekt (sein) vs. fahren mit Objekt (haben).
Read aloud: Say full Perfekt sentences out loud. The rhythm of Ich bin gegangen versus Ich habe gegessen becomes instinctive faster through speaking than through reading alone.
Complete exercises: Reinforce with the 12 exercises below.

Conclusion

Choosing between haben and sein in the Perfekt comes down to one clear principle: verbs expressing directed movement or a change of state take sein, as do bleiben and sein itself. Everything else — all transitive verbs, reflexive verbs, modal verbs, and most intransitive verbs — takes haben. Memorising the core list of sein-verbs and applying the two-question test will cover nearly every situation you encounter. The next lesson on Separable and Inseparable Verb Prefixes will show you how the ge- prefix in the past participle interacts with separable and inseparable verbs, building directly on what you have learned here.