There are some English verbs that can be used both intransitively and transitively. Verbs such as "break," "close," and "melt" can appear in intransitive active, transitive active, and passive constructions. Although native English speakers know in what kind of context a target verb is used in a certain construction,…

There have been many studies on the acquisition of English unaccusative verbs which make use of learner corpora. Most of these studies have so far concluded that even advanced learners of English ungrammatically passivize unaccusative verbs and produce sentences such as "*The accident was happened" and "*The mobile phone was…