Meaning alone cannot choose the case
Helping and supporting can describe similar real-world actions, yet their German object patterns differ. Learn a complete example with the verb, case and intended sense. A translated direct object is not a reliable guide to German case.
Wir unterstützen den Kollegen. Wir helfen dem Kollegen.
We support the colleague. We help the colleague.
A new preposition may signal a new sense
A group consisting of people is different from a person insisting on an answer. Do not freely swap prepositions just because the nouns concern the same topic. Store each construction with a distinct example.
Das Team besteht aus drei Personen.
The team consists of three people.
An omitted complement can still belong to the verb
A waiting sentence can omit what is awaited when context supplies it. That does not make the full auf phrase an arbitrary location. Separately identify added circumstances, such as the place where waiting happens. Omission by itself is not a sufficient test.
Wir warten auf Nora vor dem Haus.
We are waiting for Nora in front of the house.
Practise this pattern
The matching block includes guided questions, a separate mastery check and spaced review. The first 10 blocks and two samples at each higher level are free; other blocks require course access or an eligible seven-day trial. These tasks practise specific grammar patterns and do not certify a complete language level.
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References
Original explanations and examples informed by grammar references. Level placement is an editorial teaching choice.