Mehrere Kollegen helfen mir dabei, die wichtigen Schlüsselwörter im Bericht zu markieren.

Questions & Answers about Mehrere Kollegen helfen mir dabei, die wichtigen Schlüsselwörter im Bericht zu markieren.

Why does the verb helfen use mir instead of mich?
helfen is one of the few German verbs that takes a dative object rather than an accusative one. So the person receiving help goes in the dative case: mir is the dative form of ich. Using mich (accusative) with helfen would be ungrammatical.
What role does dabei play in this sentence?
dabei literally means “with it” or “in doing so.” Here it links the main clause to the following infinitive clause (zu markieren) and emphasizes that the colleagues are helping “in the process of” marking keywords. German often inserts dabei before a zu-infinitive when you want to show that one action supports another.
Why is there a comma before die wichtigen Schlüsselwörter im Bericht zu markieren?
German punctuation rules require a comma before an infinitive clause introduced by zu when it is accompanied by words like dabei, um, ohne, statt, anstatt or außer. Since dabei appears earlier, the comma is mandatory here.
Why do we need zu before markieren?
German subordinate infinitive clauses that express purpose or consequence use zu + infinitive, similar to English “to mark.” Without zu, the clause would not be a proper subordinate clause but part of a verb cluster, which only occurs with certain verbs (e.g., modals).
Why is the adjective wichtig in the form wichtigen?
Because it’s an attributive adjective modifying the plural noun Schlüsselwörter after the definite article die, it follows the weak declension pattern. For accusative plural (direct object), the ending is -en, giving wichtigen.
Why is im used before Bericht instead of in dem?
im is simply the contraction of in dem, used here because in with a location (the report) requires the dative case. Using im is more idiomatic and common in German.
Why are compounds like Schlüsselwörter capitalized and why the umlaut?
All German nouns, including compounds, are capitalized. Schlüsselwörter is a compound of Schlüssel (key) and Wort (word). The plural of Wort is Wörter when referring to distinct words, and it adds an umlaut plus -er.
Could I rephrase the sentence using a nominalized verb instead of a zu-infinitive? How?

Yes. You can turn markieren into the noun Markieren and use beim (bei + dem):
Mehrere Kollegen helfen mir beim Markieren der wichtigen Schlüsselwörter im Bericht.
Here Markieren is a nominalized verb, and der wichtigen Schlüsselwörter is genitive plural.

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How do German cases work?
German has four grammatical cases: nominative (subject), accusative (direct object), dative (indirect object), and genitive (possession). The case determines the form of articles and adjectives. For example, "the dog" is "der Hund" as a subject but "den Hund" as a direct object.

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