A main clause and two standard verb-group orders

A class compares the original Dutch examples “Morgen ga ik naar school”, “Ik blijf thuis omdat ik ziek ben”, “omdat ik gewerkt heb” and “omdat ik heb gewerkt”. One learner counts words instead of constituents and assumes the second written position always selects the verb. Another rejects one of the final examples merely because the auxiliary is not the last word. A third distinguishes the ordinary declarative main clause, the subordinate clause and an established two-verb group with variation. The task asks for an explanation, not an identical formula for every complex verb sequence. No spoken recording, dialect calibration or official examination score is supplied. A valid response should identify the construction and avoid adding an object that the intended meaning of werken does not require.