Here is one of the genuinely good pieces of news in German grammar: there is no -ly ending. Where English carefully distinguishes quick (adjective) from quickly (adverb), or good from well, German uses the same bare word for both jobs. The adjective schnell means "fast," and the adverb "quickly" is also just schnell. The adjective gut means "good," and the adverb "well" is also just gut. Once you understand this, a whole category of English errors disappears — and you only ever have to learn one form.
The core idea
German adjectives wear endings only when they sit directly in front of a noun (attributive position): ein schnelles Auto ("a fast car"). In every other use, the word appears bare, with no ending at all:
- As a predicate adjective, after sein, werden, bleiben (to be, to become, to stay): Das Auto ist schnell. ("The car is fast.")
- As an adverb of manner, describing how an action happens: Das Auto fährt schnell. ("The car drives fast / quickly.")
The bare form is identical in both. Look at the same word doing both jobs:
Er ist schnell.
He is fast. (predicate adjective — describes him)
Er läuft schnell.
He runs fast / quickly. (adverb — describes the running)
In English you'd need fast in the first and arguably fast or quickly in the second; with good the split is unmistakable — he is good vs he sings well. German makes no such switch:
Das ist gut.
That is good. (predicate adjective)
Er singt gut.
He sings well. (adverb)
Why German works this way
English inherited its -ly adverb suffix from Old English -līce ("-like"), and over centuries it became a near-obligatory marker: to turn most adjectives into adverbs, you tack on -ly. German had a cousin of that suffix too, but it went a different way: the suffix faded, and the bare adjective simply took over the adverb role. So in modern German the manner adverb is just the uninflected stem of the adjective — nothing added, nothing changed.
This is why endings are the real dividing line in German, not part of speech. Ask one question: Is this word sitting directly before a noun? If yes, it inflects (ein lauter Knall). If no — whether it's a predicate adjective or a manner adverb — it stays bare (Der Knall war laut / Es knallte laut).
Die Musik ist laut.
The music is loud. (predicate adjective)
Sie spricht laut.
She speaks loudly. (adverb)
Das war eine laute Party.
That was a loud party. (attributive — note the ending -e)
The third sentence is the only one with an ending, because laut sits in front of the noun Party. The other two are bare.
More parallel pairs
The pattern is utterly consistent. Here is the same word as predicate adjective and then as manner adverb:
| Word | Predicate adjective | Adverb of manner |
|---|---|---|
| gut | Das Essen ist gut. (The food is good.) | Er kocht gut. (He cooks well.) |
| schnell | Der Zug ist schnell. (The train is fast.) | Der Zug fährt schnell. (The train goes fast.) |
| leise | Der Raum ist leise. (The room is quiet.) | Sprich bitte leise. (Please speak quietly.) |
| schön | Das Lied ist schön. (The song is beautiful.) | Sie singt schön. (She sings beautifully.) |
| langsam | Der Verkehr ist langsam. (The traffic is slow.) | Fahr langsam! (Drive slowly!) |
Bitte sprich leise, das Baby schläft.
Please speak quietly, the baby is sleeping.
Sie hat die Prüfung gut bestanden.
She passed the exam well.
Der neue Praktikant arbeitet sehr sorgfältig.
The new intern works very carefully.
Notice the last one: sorgfältig ("careful / carefully") is bare as an adverb, exactly like schnell and gut. The English translation needs "-ly," but the German doesn't.
A note on comparison
Because adjective and adverb are the same word, they also compare the same way. The comparative of the adjective schnell is schneller, and that very form serves as the comparative adverb too:
Kannst du bitte etwas schneller fahren?
Can you please drive a bit faster?
Er spricht besser Deutsch als ich.
He speaks German better than I do.
Besser is the comparative of gut, working here as an adverb ("better"), with no separate "more-well" form. (For the full comparison system, see the comparative page.)
Common Mistakes
❌ Er läuft schnelle.
Incorrect — no ending on a manner adverb.
✅ Er läuft schnell.
He runs fast.
English speakers, sensing that the adverb should somehow be "marked," add an -e by analogy with attributive endings. But adverbs are bare. The -e would only appear if schnell stood before a noun.
❌ Er singt gutlich.
Incorrect — invented an -ly-style suffix.
✅ Er singt gut.
He sings well.
There is no German -lich (or any suffix) that turns gut into an adverb. (The suffix -lich does exist, but it builds new adjectives like freundlich "friendly," not adverbs from existing ones.)
❌ Das Essen schmeckt gutes.
Incorrect — after schmecken the word is a predicate-style bare form.
✅ Das Essen schmeckt gut.
The food tastes good.
After verbs like schmecken, aussehen, klingen the adjective stays bare, just as it does after sein. No ending.
❌ Sie spricht gut Deutsch und schreibt gutly auch.
Incorrect — there is no -ly to attach.
✅ Sie spricht gut Deutsch und schreibt auch gut.
She speaks German well and also writes well.
❌ Fahr langsamly!
Incorrect — the adverb is the bare adjective.
✅ Fahr langsam!
Drive slowly!
Key Takeaways
- German has no -ly suffix. The manner adverb is simply the bare adjective stem.
- Adjectives take endings only when attributive (directly before a noun). Predicate adjectives and adverbs are both bare.
- "Good" and "well" are the same word: gut. So are schnell (fast/quickly), laut (loud/loudly), schön (beautiful/beautifully).
- The adjective and the adverb also compare identically (schnell → schneller, gut → besser).
Now practice German
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Start learning German→Related Topics
- German Adjectives: An OverviewA1 — The fundamental split between uninflected predicate adjectives and inflected attributive adjectives, and how it sets up the three declension patterns.
- The ComparativeA2 — How German builds the comparative by adding -er to the adjective itself — never 'more' — with obligatory umlaut on a predictable set and als for 'than'.
- Weak Adjective Declension (after der-words)A2 — The weak endings used when a definite article or der-word already shows the case: only -e or -en, with -e in just five cells.