its representation in the passive. A review of data from syntax, language acquisition, and psycholinguistics shows that the implicit agent is not just a conceptually understood argument. It is argued that it is represented at the level of argument structure and that this is what sets the passive apart from other patient-subject constructions. A corpus-based case study on the use of the passive in academic writing analyzes the use of the passive in this particular register. One of the findings is that about 20-25% of passives occur in constructions that do not require an auxiliary, a result that challenges corpus studies on the use of the passive that only consider full be -passives. It is also shown that new active-voice constructions have emerged that compete with the passive without having a more visible agent. The emergence of these constructions (such as "This paper argues...") is discussed in the context of changes in the rhetoric of scientific discourse. The book is mainly of interest to linguists and graduate students in the areas of English syntax, semantics, and pragmatics.