German discourse particles are geared to certain clause types (declarative, polar interrogative, wh-interrogative, exclamative, imperative) and arise mainly in root clauses. They make a semantic contribution by co-determining the illocutionary force of an utterance. In this talk, I approach the phenomenon of discourse particles from a syntactic perspective and address the following questions: (i) What is the syntactic status of discourse particles? How are they merged? (ii) How is the clause-type sensitivity of discourse particles implemented?