  We present an unsupervised method to detect English unergative and
unaccusative verbs. These categories allow us to identify verbs participating
in the causative-inchoative alternation without knowing the semantic roles of
the verb. The method is based on the generation of intransitive sentence
variants of candidate verbs and probing a language model. We obtained results
on par with similar approaches, with the added benefit of not relying on
annotated resources.
