||Seo, So Young. (2020). Studies on passive constructions in Spanish. The Linguistic Association of Korea Journal, 28(2), 43-56. The Spanish language has three forms of passive constructions. Being one way of using the passive voice in Spanish, the passive SE constructions are used with nouns conjugated in the third-person singular and third-person plural forms. In passive construction with SER, ESTAR, the object or person receiving the action of the verb is followed by a form of the SER/ ESTAR and a past participle. Moreover, when the agent is stated, the preposition POR follows it. Throughout this paper, we will argue that the passive constructions with SE correspond to the passive with SER and the passive with ESTAR. These passive constructions contain the aspectual features. However, the SE is different from the SER and the ESTAR in the following point: POR-agent does not appear in the constructions with SE but shows up in the passive with SER and the ESTAR. Hence, without a doubt, POR-agent plays a crucial role in distinguishing the SE from the SER and the ESTAR. We will suggest that the SE is derived from the Lexical Syntax in sense of Harley (1996). The passive SE is located at the EVENT head in Lexical Syntax. From this point of view, the passive SE can be distinguished from the impersonal SE.