The complement of bliuwe stay may be headed by a to-infinitive. Furthermore, the selected to-infinitive must denote a customary activity which has a certain duration and which is associated with a designation location, such as sleeping, excercising, eating, working and the like:

The to-infinitive may not be expanded with subcategorised material, unless it is incorporated:

Note that the latter sentence does not mean that Rinskje kept on drinking tea. It means that Rinskje stayed somewhere, or stayed longer somewhere, in order to have tea. The Dutch translation equivalent, in contrast, can have the meaning that Rinskje kept on drinking tea, so expressing a purely durative aspect. In contrast, Frisian ties the durative aspect down to locational presence.

The to-infinitive must denote a personal activity:

The to-infinitive may not denote an verb that does not express a customary activity:

However, the latter example could be grammatical in a context where calling on God is a customary activity. As a result, the sentence below could be uttered in a monastery, in which it is customary to invoke God, say, in the evening:

In case the incorporated infinitive does not function as a complement but as an adjunct, the selectional restrictions mentioned above are partly obviated, more specifically, the activity need not be customary.

By and large, noun-incorporations tend to denote customary activities, such as the following: