Clause-chains and converbs represent typologically distinctive ways of clause combination. Modern Tibetan has highly elaborated clause-chain and converbial structures, which are also quite unique among Tibeto-Burman languages. The clause-chain and converbial structures of Mdungnag Tibetan are representative in Tibetan, and their morphosyntactic features are mainly reflected in four aspects. In Mdungnag Tibetan, there are different markers for converbial and medial clauses depending on whether the clause is realis or irrealis. Converbial clauses and medial clauses are non-finite, while the matrix clauses are finite. Converb clauses and medial clauses can switch reference freely. The clause-chain and converbial structures of Mdungnag Tibetan are morphosyntactically distinct from conjunctive structures as well as juxtaposed structures.