This chapter aims to clarify the development of participial constructions in the history of English, with special reference to case assignment and clause structure. It is argued that a lexical subject in participial constructions was assigned dative/objective case by a prepositional head in Old and Early Middle English, while it was assigned nominative case via an Agree relation with T, which inherits φ-features from C, from Late Middle English onward. However, based on the observation that nominative absolutes became increasingly infrequent in Late Modern English, it is suggested that participial constructions began to lose the CP domain and the structure without CP has been predominant since the nineteenth century. Moreover, corpus-based investigations are conducted on the distribution of a subject, a participle, and negation in participial constructions, revealing that they had verb movement to T and further movement to C in early English. It is claimed that the development of verb movement in participial constructions is accounted for by adopting a minimalist, Agree-based analysis of verb movement along the lines of Haeberli and Ihsane (Natural Language and Linguistic Theory 34, 497–542, 2016), where the structural change of participial constructions, as well as the decline and subsequent loss of verb second in finite clauses, played an important role.