05. March 2025
Studying in Germany: Recognised language certificates
For international students who wish to study in Germany, proof of German language skills is…
In which case (= casus) is a word or part of a sentence? What do prepositions have to do with cases? And how can you combine parts of sentences and whole sentences? Questions upon questions that often lead to grammatical errors for German learners. But there’s no need to worry. Today we’ll give you a few answers to these questions so that you can avoid typical mistakes when learning German in the future.
If you are currently learning German, the four cases – nominative, accusative, dative and genitive – can be a real challenge, which is why they also lead to many typical mistakes. Nouns, pronouns, adjectives and articles must always be in the correct case so that sentences in German don’t sound incomprehensible.
Each case has a specific meaningful task in the respective sentence and can be correctly assigned using a separate control question. So let’s take a closer look at this:
Nominative
The nominative refers to the subject, that is what performs the action. In this case you can use the control question “Wer oder Was?“ (= Who or what?)
Accusative
The accusative then shows the direct object, that is what the action is directed towards. For the direct object, you ask: “Wen oder Was?” (= Who or what?)
Dative
The dative is used for the indirect object, that is the object which benefits from or is affected by the action. The corresponding control question is: “Wem?” (= To whom?)
Be careful, there is a small stumbling block here that can quickly lead to errors when forming plurals. When we use the dative case in the plural, we need the article “den” instead of “die” and in the noun we need the ending “-n”. For instance, we use “die Hunde” (= plural of “der Hund”) in the dative plural as follows:
Genitive
The genitive shows possession or belonging and is checked with the question “Wessen?” (= Whose?). Even in the singular, we have to be precise with the genitive! It is not enough to use the correct article. Furthermore you have to pay attention to the ending, since masculine and neutral nouns need the ending “s” or “es”.
We also have to be careful when forming plurals. If we use the genitive in the plural, we need the article “der” instead of “die”, as in:
- German example: “Das Fell der Hunde ist weich.“
- English example: “The dogs’ fur is soft.”
It is important to know that prepositions in German always require a specific case (accusative, dative or genitive). For instance, “mit” always requires the dative case, “mit dem Freund” (= with the friend), while “für” only requires the accusative case: “für den Freund” (= for the friend).
Please note: With some prepositions that we use very frequently, such as “in”, we even have to choose between the accusative and dative. The question “Wo oder Wohin?” (= Where or where to?) helps us to decide on the correct case.
One of the prepositions that is preferably used with the genitive is “wegen”. In everyday life, many people say “wegen dem Regen” because the dative case is also possible. However in a written text, German professionals will opt for the elegant and correct “wegen des Regens” (= because of the rain).
Our tip: When learning German, take yourself enough time to memorize the prepositions and their corresponding cases. Then you can avoid mistakes in the future! The right questions and example sentences can help you to memorize the rules. 💡
Another typical mistake when learning German is not joining sentences together correctly. Words such as “und”, “oder” and “aber” play a central role here. These so-called subordinating conjunctions are important language elements that help us to structure what is said or spoken. For instance, we can use subordinating conjunctions to link two independent main clauses.
Important: As two independent clauses are connected, the sentence position of the individual main clauses remains as usual: subject in position 1, verb in position 2 and then the object.
Even if you combine two decision questions, the sentence order in the individual question sentences does not change: verb in position 1, subject in position 2.
When learning German, memorize from the start that a subordinating conjunction does not change the sentence order in the connected sentences. Our examples show you how to use three common subordinating conjunctions correctly.
“Und” connects similar or related information:
“Oder” indicates a choice:
“Aber” expresses a contrast:
Enhance your german and explore our introductory article about typical mistakes.