If you learn only three verbs perfectly in your first weeks of German, make them sein, haben, and werden. They are the most frequent verbs in the language, they are all irregular, and — most importantly — they do double duty. Each one is both a full verb in its own right and a structural auxiliary that builds entire tenses and the passive voice. Master these three and you have quietly unlocked the Perfekt, the future, and the passive all at once.
sein — to be
sein is the most irregular verb in German, just as to be is the most irregular verb in English (am, are, is, was, were). Its present forms barely resemble the infinitive and must be memorized outright:
| Pronoun | Form |
|---|---|
| ich | bin |
| du | bist |
| er / sie / es | ist |
| wir | sind |
| ihr | seid |
| sie / Sie | sind |
Note seid (ihr) with no t on the end and no i-e split — a classic spelling trap. As a full verb, sein links a subject to a description, a profession, an origin, or a state:
Ich bin todmüde, ich gehe gleich ins Bett.
I'm dead tired, I'm going to bed soon. (informal)
Seid ihr schon mal in Wien gewesen?
Have you ever been to Vienna? (informal)
haben — to have
haben is more regular but still has two irregular forms — the du and er/sie/es forms drop the b:
| Pronoun | Form |
|---|---|
| ich | habe |
| du | hast |
| er / sie / es | hat |
| wir | haben |
| ihr | habt |
| sie / Sie | haben |
You'd expect du habst and er habt from the regular pattern, but the b falls out: du hast, er hat. As a full verb, haben expresses possession and is also baked into countless idioms about states the body feels:
Hast du heute Abend Zeit?
Do you have time this evening? (informal)
Sie hat großen Hunger und keine Lust zu kochen.
She's really hungry and doesn't feel like cooking.
werden — to become
werden is the verb English has no clean equivalent for. Its core meaning is to become / to get, marking a change into a new state. It has two irregular forms to watch — du wirst and er/sie/es wird:
| Pronoun | Form |
|---|---|
| ich | werde |
| du | wirst |
| er / sie / es | wird |
| wir | werden |
| ihr | werdet |
| sie / Sie | werden |
As a full verb, werden describes a transition — weather turning, someone growing up, a mood shifting:
Es wird langsam kalt, zieh dir was an.
It's slowly getting cold, put something on. (informal)
Mein Neffe will Arzt werden.
My nephew wants to become a doctor.
The crucial distinction: werden means to become, sein means to be, and bleiben means to stay. English blurs this with "get" and "be"; German keeps them sharply apart. Ich bin müde = I am tired (a state); Ich werde müde = I'm getting tired (a change).
The double life: these three are also auxiliaries
Here is why these three verbs are worth front-loading. Each one is the engine of a major construction. Learn the present forms above and you already hold the key to three tense/voice systems.
haben and sein build the Perfekt
The Perfekt — German's everyday spoken past — is auxiliary + past participle. Most verbs take haben; verbs of motion and change of state take sein:
Ich habe gestern den ganzen Tag gearbeitet.
I worked all day yesterday.
Wir sind mit dem Zug nach Hamburg gefahren.
We took the train to Hamburg.
The choice between them is governed by clear principles — we cover it on the haben vs sein in the Perfekt page. The point for now: the habe and bin/sind you just learned are the very forms you'll be slotting in.
werden builds the Futur
For Futur I, werden acts as the auxiliary, paired with an infinitive at the end of the clause (the Satzklammer again):
Ich werde dich morgen anrufen, versprochen.
I'll call you tomorrow, promise. (informal)
Das wird schon klappen.
It'll work out, don't worry. (informal — also expresses confident assumption)
See Futur I for the full picture, including how werden can also express present-tense probability ("that'll be the postman").
werden builds the Passiv
The same werden also forms the passive voice (Vorgangspassiv), here paired with a past participle:
Das Formular wird von der Sekretärin ausgefüllt.
The form is filled out by the secretary. (formal/written register)
So werden alone covers three jobs: full verb (become), future auxiliary, and passive auxiliary. These three uses are easy to confuse, which is why we untangle them on the three uses of werden page.
Common Mistakes
❌ Ich bin Hunger.
Incorrect — German uses haben, not sein, for hunger.
✅ Ich habe Hunger.
Correct — bodily states take haben.
❌ Du hast recht, du bist sehr klug — du habst immer die besten Ideen.
Incorrect — du habst is a regularized form.
✅ Du hast immer die besten Ideen.
Correct — the b drops: du hast.
❌ Ihr seit schon bereit.
Incorrect — the ihr-form is 'seid' (with d); 'seit' is the preposition 'since'.
✅ Ihr seid schon bereit.
Correct — ihr seid (with -d), not 'seit'.
❌ Es ist kalt draußen, zieh dir was an.
Incorrect for a change in progress — ist describes a fixed state, not the transition to cold.
✅ Es wird kalt draußen, zieh dir was an.
Correct — werden marks the change 'it's getting cold'.
❌ Ich will ein Arzt werden.
Incorrect — no article before an unmodified profession after werden.
✅ Ich will Arzt werden.
Correct — professions are bare after werden/sein.
Key Takeaways
- sein is fully irregular: bin, bist, ist, sind, seid, sind — watch seid (no t, spelled with d).
- haben drops the b in two forms: du hast, er hat; use it for bodily states (Hunger, Durst, Angst).
- werden means to become and has du wirst, er wird; keep it distinct from sein (be) and bleiben (stay).
- All three lead a double life: haben/sein drive the Perfekt, werden drives the Futur and the Passiv.
- Learning these three early pays compound interest — they reappear in every compound tense and the passive.
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Start learning German→Related Topics
- sein: Full Conjugation and UsageA1 — Complete conjugation of sein 'to be' across every tense and mood, with usage notes, principal parts, idioms, and the errors English speakers make.
- haben: Full Conjugation and UsageA1 — Complete conjugation of haben 'to have' across every tense and mood, with usage notes, principal parts, the Hunger/Angst/Zeit idioms, and the errors English speakers make.
- werden: Full Conjugation and UsageA1 — Complete conjugation of werden across every tense and mood, plus its three jobs — full verb 'become', future auxiliary, and passive auxiliary — with the auxiliary trap that catches English speakers.
- Perfekt Auxiliary: haben vs seinA2 — How to choose between haben and sein in the German Perfekt — motion and change of state take sein, and a direct object flips it to haben.
- Futur I: Future and Probability with werdenB1 — How to form the Futur I with werden plus an infinitive, and why it more often signals probability about the present than the actual future.
- The Three Uses of werdenB1 — One verb, three jobs: werden is a full verb ('become'), the future auxiliary, and the passive auxiliary — told apart by whatever follows it.