Hy is besig om te werk.
He is busy working.
- Besig wees om te [busy be INF.CONJ to] is not restricted to agentive contexts - cf. Hy is besig om sy bewussyn te verloor [3SG.M.NOM is busy INF.CONJ his consciousness to lose.INF] 'he is in the process of losing consciousness').
The placement of is here is dictated by V2.
- naturalistic spoken
- Own knowledge