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Lesson 5: Stem-changing verbs

Vocabulary: Hobbies and leisure

Completing this lesson will add to your overall progress:

VocabularyA1+4%A2+1%
GrammarA1+4%A2+1%

How to work with this lesson

  1. Read the rule — get the logic (5 minutes)
  2. Say it out loud — slowly, consciously, analyzing every form
  3. Speed up — run the scales and matrix until the forms fly out

You can conjugate regular verbs on autopilot. Now — the vowel-shift bandits. They change their stem vowel, but ONLY for du and er/sie/es. Other persons — business as usual.

Part 1: Three vowel-shift patterns

All bandit verbs fall into three groups. Three, not three hundred. Learn the pattern, and every new verb will slot into one of three boxes.

Pattern 1: a → ä

Stem a becomes ä for du and er/sie/es.

Pronounfahren (to drive/travel)
ichfahre
dufährst
er/sie/esfährt
wirfahren
ihrfahrt
sie/Siefahren

Same pattern:

  • schlafen (to sleep — ≈ "sleep") → du schläfst, er schläft
  • tragen (to carry / wear) → du trägst, er trägt
  • waschen (to wash — ≈ "wash") → du wäschst, er wäscht
  • laufen (to run — ≈ "leap"?) → au → äu: du läufst, er läuft

Pattern 2: e → i

Stem e becomes short i for du and er/sie/es.

Pronounsprechen (to speak — ≈ "speak"!)
ichspreche
dusprichst
er/sie/esspricht
wirsprechen
ihrsprecht
sie/Siesprechen

Same pattern:

  • geben (to give — ≈ "give") → du gibst, er gibt
  • helfen (to help — ≈ "help") → du hilfst, er hilft
  • treffen (to meet) → du triffst, er trifft
  • essen (to eat — ≈ "eat") → du isst, er isst

Pattern 3: e → ie

Stem e becomes long ie for du and er/sie/es.

Pronounlesen (to read)
ichlese
duliest
er/sie/esliest
wirlesen
ihrlest
sie/Sielesen

Same pattern:

  • sehen (to see — ≈ "see"!) → du siehst, er sieht
  • empfehlen (to recommend) → du empfiehlst, er empfiehlt

The vowel shift is actually an echo of an old English pattern too: "I write / he writes / he wrote / written". Same idea — vowel changes between forms. English just shifted it to past tense; German kept it in present.

Part 2: The main hack

The vowel shift happens in ONLY two forms: du and er/sie/es. All other persons conjugate normally, no stem change.

Two out of seven. Not so scary.

Look at the tables again: ich, wir, ihr, sie/Sie — standard endings, standard stem. Nothing weird. The rebellion is only for "you" and "he/she/it".

Part 3: Three patterns side by side

fahren (a→ä)sprechen (e→i)lesen (e→ie)
ichfahresprechelese
dufährstsprichstliest
er/sie/esfährtsprichtliest
wirfahrensprechenlesen
ihrfahrtsprechtlest
sie/Siefahrensprechenlesen

See the pattern? Rows for ich, wir, ihr, sie/Sie — standard. Only du and er/sie/es — special.

Traps

Trap 1: essen essen → du isst, er isst. Double "s" — because the stem "ess-" loses its "e", becomes "iss-", and the "-t" ending tacks on top. Du isst, er isst — the forms are identical.

Trap 2: nehmen nehmen → du nimmst, er nimmt. Not just the vowel changes (e→i), the consonant too: h disappears, m doubles. This is a one-off — just memorize it.

Next up: Lesson 6 — modal verbs: können, müssen, wollen, dürfen, sollen, möchten. kann ≈ "can", muss ≈ "must", soll ≈ "shall". Free vocab. But beware one nasty false friend: will ≠ "will" — it means "want to"!

Lesson 5: Stem-changing verbs · Deutsch · Glottos Matrix