Adjectives derived from je-verbs are subject to restrictions which adjectives derived from other verbs are not subject to. They may not occur in the partitive, as is shown below:

In spoken language, the je-verb is sometimes used as if it belonged to the normal (non je) verb class. This happens under the influence of Dutch, since it only happens if there is a similar Dutch equivalent. Now, the past participle ferskimmelegrown mouldy is close to the Dutch past participle verschimmeldgrown mouldy, but the past participle útdroegedried out is not close enough to Dutch uitgedroogddried out. The difference between the two cases is that the past participial prefix ge- is present in uitgedroogddried out, but not in verschimmeldgrown mouldy. The following judgments obtain in spoken Frisian thanks to Dutch interference:

Past participles can only occur in the construction in case they have an additional lexicalised subjective interpretation. For example, seancooked cannot occur in the construction, but bedoarnspoiled can, in the context of spoiled food, as the latter is overlaid with a lexicalised subjective interpretation bad. The ungrammatical sentence below has the feel of an accidental gap, which is there for pragmatic reasons: