"if" Conditional Sentence Verb Form Of English Semantics

In this thesis, I try to reveal the meaning of verb forms in English "If conditionals within the framework of Construction Grammar. Generally speaking, "If conditionals are discussed with respect to their meanings as by philosophers or with respect to their structures as by pedagogical grammarians. While Construction Grammar makes its analysis by combining together the two aspects, which was advocated by Dancygier. It focuses on providing an explanation of how aspects of conditional form give rise to a variety of meanings that conditional sentences express. There are many kinds of conditional sentences while "If conditionals are the broadest syntactic frame of conditionals. It is necessary, in describing conditionals, to choose a set of descriptive parameters, such as the if p, (then) q frame, clause order, the varieties of relationship between p and q, and the role of if. There are pedagogical description, purely descriptive account, and philosophical description about the verb morphology in conditionals. Dancygier thinks that the usual division into "neutral" or "open" versus "unreal" or "closed" conditionals is not sufficient. By taking advantage of two concepts of "backshift" and "predictive modality", she divided the conditionals into two categories: the class of predictive which includes hypothetical or distanced predictive conditionals and the non-predictive class. The temporal reference of if clauses is established on the basis of a number of parameters, among which the verb form plays an important, but not unique role. Other factors contributing to temporal interpretation are as follows: other explicit temporal indicators; the semantic class of verb (state or event); the context; and the overall interpretation of the sentence as being hypothetical or not, and predictive or not.