All German word comparisons · Back to the topic overview
Meaning, sentence patterns and examples
| Word | Core meaning | Typical context | Grammar |
|---|---|---|---|
| sondern | but rather; instead | correcting a rejected alternative | coordinating conjunction; comma before |
| aber | but; however | contrast, reservation or unexpected result | coordinating conjunction; clause order retained |
sondern
Meaning and usage: Use sondern when you reject one description and supply the appropriate alternative. Negation may be expressed by nicht, kein, nie or another negative expression; it does not have to be the literal word nicht. With nicht nur …, sondern auch …, the first item is affirmed and the second is added. That pattern does not mean the first item was false.
Grammar: Sondern coordinates clauses or smaller expressions and normally has a preceding comma. It does not independently send the verb to the end. A complete following main clause retains main-clause order; shared words can be omitted in a parallel phrase. In joined subordinate material, the original subordinate construction can retain final verbs.
Das ist kein Fehler, sondern eine bewusste Entscheidung.
This is not a mistake but a deliberate decision.
Er lernt nicht nur Deutsch, sondern auch Spanisch.
He is learning not only German but also Spanish.
aber
Meaning and usage: Use aber when two facts contrast or when the second is unexpected in light of the first. Both may remain true: a room can be small but bright. A negative first clause is possible if the second adds a contrasting fact rather than replacing what was denied. Aber can also occur as an emphasis particle in exclamations; that is a different use from joining clauses.
Grammar: Before another main clause, aber stands outside its ordinary first-position slot: aber ich komme morgen. The finite verb remains second within that clause. A comma normally precedes conjunction aber. It can also appear inside the clause, as in ich komme aber morgen, without changing this to subordinate order.
Das Zimmer ist klein, aber sehr hell.
The room is small but very bright.
Ich habe kein Auto, aber ich fahre gern Zug.
I do not have a car, but I enjoy traveling by train.
Overlap and context
Ich trinke keinen Kaffee, sondern Tee gives tea as the alternative to the rejected coffee. Ich trinke keinen Kaffee, aber meine Schwester schon contrasts two people. These sentences both contain negation, yet their logical relationships differ. Rather than scanning mechanically for nicht or kein, ask whether the second part replaces the denied item or adds another fact. Some contexts allow either connector with a change in emphasis; include enough context to make your intended relationship clear.
Common mistakes
- Do not choose sondern merely because a sentence contains nicht; a contrasting additional fact can take aber.
- Do not put the finite verb at the end just because aber or sondern connects two main clauses.
- Keep parallel structure in nicht nur …, sondern auch … when joining matching nouns or phrases.
- Do not omit the usual comma before aber or sondern in the examples taught here.
Memory aid: Aber keeps a contrast. Sondern supplies the correction: not X, rather Y. Give nicht nur …, sondern auch … its own memory line because it adds rather than rejects X.
Try it
Choose the connector: Ich wohne nicht in Berlin, ___ in Leipzig.
Show the answer
sondern
Leipzig corrects the rejected location Berlin. With another contrasting fact, rather than a replacement location, aber could be appropriate.