What are common mistakes with Stammvokaländerung?

Learners apply the vowel change to all forms: wir fähren instead of wir fahren. Only du and er/sie/es change. 🇬🇧 English speakers: English speakers may apply the vowel change to all persons since English irregular verbs change the stem throughout (drive/drove). 🇷🇺 Russian speakers: Russian speakers understand stem changes well (Russian also has consonant/vowel alternations) but may apply them to the wrong persons. 🇨🇿 Czech speakers: Czech speakers handle this concept naturally since Czech has similar vowel alternations, but may over-generalize changes to wir/sie forms.

Stammvokaländerung: Regeln, Beispiele & Übungen | German Grammar A1

Stammvokaländerung

A1 — Verben

Stem-changing verbs: fahren→fährt, lesen→liest

Can use common stem-changing verbs in conversation

Examples

Er fährt morgen nach München. — He is driving to Munich tomorrow.
Sprichst du Deutsch? — Do you speak German?
Sie liest gern Romane. — She likes reading novels.

VerbsA1

Stammvokaländerung

Stem-changing verbs: fahren→fährt, lesen→liest

Learning Goal

Can use common stem-changing verbs in conversation

Exam Skills:WritingSpeaking

Look at these examples. Can you spot the grammar pattern?

Er fährt morgen nach München.

He is driving to Munich tomorrow.

Sprichst du Deutsch?

Do you speak German?

Sie liest gern Romane.

She likes reading novels.

Pay attention to the highlighted parts. What do they have in common?

Einige häufige Verben ändern ihren Stammvokal in der du- und er/sie/es-Form.

Drei Wechseltypen:

Wechsel	Infinitiv	du	er/sie/es
a → ä	fahren	fährst	fährt
	schlafen	schläfst	schläft
e → i	sprechen	sprichst	spricht
	essen	isst	isst
e → ie	lesen	liest	liest
	sehen	siehst	sieht

Wichtig: Der Vokalwechsel betrifft nur die du- und er/sie/es-Formen. Alle anderen Formen behalten den Original-Vokal: wir fahren, ihr fahrt.

Apply this grammar in A1 course exercises

Practice Exercises

Stammvokaländerung: Stem-changing verbs: fahren→fährt, lesen→liest

Learners apply the vowel change to all forms: wir fähren instead of wir fahren. Only du and er/sie/es change. 🇬🇧 English speakers: English speakers may apply the vowel change to all persons since English irregular verbs change the stem throughout (drive/drove).

Common Error Patterns

Incorrect verb ending for the subject

Review verb conjugation tables and practice matching endings to pronouns

Forgot stem vowel change in irregular verbs

Practice stem-changing verbs (e→i, e→ie, a→ä) with flashcards

Verb placed in wrong position

Remember: V2 in main clauses, verb-final in subordinate clauses

Er fährt morgen nach München.

He is driving to Munich tomorrow.

fahren: a → ä in the er-form: er fährt.

Sprichst du Deutsch?

Do you speak German?

sprechen: e → i in the du-form: du sprichst.

Sie liest gern Romane.

She likes reading novels.

lesen: e → ie in the er/sie-form: sie liest.

Practice in course

Apply this grammar in A1 course exercises

A1 Course

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Put it into practice

Try a free exercise from the course

13. Appointments and arrangements

Frequently asked questions

When is Stammvokaländerung used?: Einige häufige Verben ändern ihren Stammvokal in der du - und er/sie/es -Form.
How is Stammvokaländerung formed?: Wichtig: Der Vokalwechsel betrifft nur die du - und er/sie/es -Formen. Alle anderen Formen behalten den Original-Vokal: wir fahren , ihr fahrt .
What are common mistakes with Stammvokaländerung?: Learners apply the vowel change to all forms: wir fähren instead of wir fahren. Only du and er/sie/es change. 🇬🇧 English speakers: English speakers may apply the vowel change to all persons since English irregular verbs change the stem throughout (drive/drove). 🇷🇺 Russian speakers: Russian speakers understand stem changes well (Russian also has consonant/vowel alternations) but may apply them to the wrong persons. 🇨🇿 Czech speakers: Czech speakers handle this concept naturally since Czech has similar vowel alternations, but may over-generalize changes to wir/sie forms.