Breakdown of Ich spreche mit einem freundlichen Mitarbeiter, weil er das Problem löst.
ich
I
ein
a, an (eine)
er
he
das Problem
the problem
Questions & Answers about Ich spreche mit einem freundlichen Mitarbeiter, weil er das Problem löst.
Why does the adjective freundlichen have an -en ending here?
The preposition mit always triggers the dative case. Since Mitarbeiter (employee) is a masculine noun, the article "a" becomes einem. In the dative case, adjectives that follow an indefinite article (like einem, keinem, or possessives like meinem) always take the -en ending.
Why is the verb löst at the very end of the sentence?
The word weil (because) introduces a dependent clause. Whenever you use a subordinating conjunction like weil, it kicks the conjugated verb to the very end of that clause. That is why the sentence ends with weil er das Problem löst instead of using the normal word order.
Why use er to mean "he" here?
In German, pronouns must match the grammatical gender of the noun they refer back to. Because der Mitarbeiter is a masculine noun, it requires the masculine pronoun er. If you were speaking with a female employee, it would be mit einer freundlichen Mitarbeiterin, and the second half of the sentence would use sie (she).
The English translation says "I am speaking", but I only see Ich spreche. Where is the "am"?