In main clauses, we always split the separable verb from its prefix if we use the simple present or past tense. We say "ik sta op" (I get up) or "ik stond op" (I got up).
We can also place other words between the verb and the prefix: "Ik sta vandaag iets vroeger op" (Today, I will get up a bit earlier). See also If the separable verb is the finite verb.
In a subordinate clause, the separable verb often remains intact.
Separable verb is the only verb in the subclause
In subclauses, all verbs are moved to the end, including the separable verb. If the separable verb is the only verb, it remains attached to its prefix:
| I wonder whether he gets up early.
|
Separable verb is not the only verb in the subclause
If there are more other verbs, you can choose:
- Leave the separable verb intact
- Place another verb between the prefix and the separable verb
Both variants are correct.
| main clause
| subject
| MANNER
| PF
| OV
|
| 1. Ik vraag me af of
| hij
| vroeg
|
| zal opstaan
|
| 2. Ik vraag me af of
| hij
| vroeg
| op
| zal staan
|
| I wonder whether he will get up early.
|
In the first example, we leave the prefix attached to the verb. This is probably the easiest variant if you just started learning Dutch.
In the second sentence, we find the prefix before the verbs. Just like in the main clause, we place the prefix at the beginning of the right part. See also Separable verb is not the finite verb about the place of the prefix in a main clause.
Questions? 
