English and Dutch middle verbs have a grammaticalsubject that is the corresponding transitive verb's object. In this paper we will account for this fact by invoking the properties of a presyntactic level of semantic representation and its interplay with syntax proper. We will argue that the grammatical subject of a middle is its actual external argument, and we will propose a model of projection of arguments that allows for this. We will show that other special properties of middle constructions follow from the way the verbs logical subject is represented at the presyntactic level of representation.In particular, it will be shown that the Affectedness Condition on middle formation is not a condition on the type of argument that can apperlr as the middle verb's grammatical subject, but that its effects and some exceptions to it naturally follow from this representation. Our model will also allow an account of Dutch impersonal and 'adjunct' middles.

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