Tibetic languages are, from the very beginning, very rich in verb verb combinations that are not simply due to the omission of contextually given arguments. Some of these combinations have grammaticalized into temporal-modal-evidential constructions, modal verb constructions, and causative constructions. A fourth type of combination, which will be described here as ‘semantically related verb verb combinations’, is rather problematic. Formally, the first verb modifies the second verb, while semantically, one might argue that they form a compound. I will show that particularly the most frequent combinations have to be analyzed as biclausal modifying constructions, while other, less frequent constructions show a greater degree of compositionality or even grammaticalization.