0 A non-finite verb is in the infinitive form or is a participle and does not show the tense and subject of the verb.
This scenario makes a non-finite complement more likely, but not obligatory.
If one allows the child to hypothesize multiple possible non-finite grammars, the problem only gets worse.
Syntactically the non-final clauses of these constructions are non-finite and cannot occur on their own.
The judgments on the items with preposed phrasal material and preposed non-finite or finite clauses are judged in a similar vain.
If it were we would have to say that reordering to adjacency was prevented if it resulted in structures with particles after the non-finite verb.
More generally, it seems that subjunctives may be finite or non-finite in the same language, with different interpretations in the two cases.
In fact, auxiliaries, subject-to-subject raising verbs and control verbs also occur with non-finite verbs.
At this level, non-finite verb forms are attested.