The goal of this paper is to offer a compositional semantics for subjunctive and indicative will conditionals, and to derive the projection properties of the types of conditionals we consider and in particular those of counterfactual conditionals. It is argued that subjunctive conditionals are "bare" conditional embedded under temporal and aspectural operators, which constrain the interpretation of the modal operators in the embedded conditional. Furthermore, it is argued that a theory of presupposition projection à la Heim together with the present (...) proposal about their logical form explains the projection facts. (shrink)

In English, the present perfect, unlike future, past, and non-finite perfects, cannot be modified by so-called ‘positional’ adverbials (Comrie 1976, McCoard 1978, a.o.). This phenomenon is known as the present perfect puzzle (Klein 1992).