Associated motion

Associated motion is a grammatical category whose main function is to associate a motion component to the event expressed by the verbal root.
This category is attested in Pama–Nyungan languages, where it was first discovered, in Tacanan, in rGyalrong languages, and in Panoan languages.
Languages with associated motion present a contrast between association motion and purposive motion verb constructions, as in the following examples from Japhug Rgyalrong.
Although both examples have the same English translation, they differ in that with the translocative associated motion prefix ɕ- implies that the buying did take place, while with the motion verb does not imply the buying took place, even though the going did. The distinction made by the translocative is similar to the distinction made in "I went and bought things".
In addition to parameters such as relative time of occurrence, argument of motion, deixis, associated motion systems can also encode speed, and these markers can then evolve into celerative markers exclusively encoding speed.