Breakdown of Ich danke einem freundlichen Techniker für den Ersatz.
ich
I
ein
a, an (eine)
danken
to thank
für
for
freundlich
friendly
der Techniker
the technician
der Ersatz
the replacement
Questions & Answers about Ich danke einem freundlichen Techniker für den Ersatz.
Why does freundlichen end in -en?
It is an adjective describing the masculine noun Techniker in the dative case. When an adjective comes after an indefinite article like einem in the dative case, it always takes the -en ending. This rule applies to all genders in the dative case!
Why are we using the dative case (einem freundlichen Techniker) when there is no preposition before it?
The verb danken (to thank) is a special verb that always requires its object to be in the dative case. In German, you do not thank someone using the accusative case; you direct your thanks to them using the dative.
Why is it für den Ersatz (accusative) and not für dem Ersatz (dative)?
The preposition für (for) is a strict accusative preposition. No matter what verb is used in the sentence, any noun phrase following für must always be in the accusative case. Since Ersatz is masculine, the definite article changes to den.
How do we know Techniker is singular here? Does it look the same in the plural?
Yes, Techniker is a masculine noun ending in -er that does not change its spelling in the plural. We know it is singular in this sentence because it follows the singular article einem.
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