States vs. Actions on Set
When coordinating a busy film set, you are constantly giving orders about what "must be done." Dutch passive constructions use the modal verb moeten along with a past participle.
However, Dutch makes a strict distinction between the finished state of a task and the ongoing action of completing it.
Stative Necessity (moet zijn)
When you want to emphasize a deadline or the finished result of an action—how things must be once the dust settles—you use moeten combined with the past participle and zijn (to be). The past participle and zijn group together at the end of the clause.
| The set must be set up at a quarter past eight. | De set moet om kwart over acht opgebouwd zijn. |
| This prop must be laid ready before we film. | Dit rekwisiet moet klaargelegd zijn voordat we filmen. |
Dynamic Obligation (moet worden)
If your focus is on the action itself—the process of the work being done—you use moeten combined with the past participle and worden (to become).
| The script must be followed exactly, albeit slowly. | Het draaiboek moet precies gevolgd worden, zij het langzaam. |
When you mention the agent (the person actually doing the work), they are introduced by door (by). Because a specific person is actively performing the task, these sentences naturally focus on the action and use worden.
| Every prop must be checked by the producer. | Elk rekwisiet moet door de producent gecontroleerd worden. |
Comparing the Two
To see the difference clearly, let's look at the same task expressed both ways.
If a crew member needs to actively perform the task right now, it is a dynamic process (worden).
| The lighting must be adjusted immediately by the cameraman. | De belichting moet meteen door de cameraman afgesteld worden. |
If you are simply setting a requirement that the task must be fully finished before the next phase can begin, you are talking about a state (zijn).
| The lighting must be adjusted before the actors arrive. | De belichting moet afgesteld zijn voordat de acteurs komen. |