Packed with tables, diagrams, and numerous example sentences, and assuming no prior knowledge of grammatical concepts on the part of the reader, this volume offers an unmatched guide to the structure of contemporary English. Arranged in three clear parts for ease of use, the Grammar s comprehensive coverage ranges from the very basic--such as word structure, simple and complex phrases, and clause types--to the more sophisticated topics that lie at the intersection of grammar and meaning, including tense and aspect, mood and modality, and information structuring | Transpositions of grammatical forms resulting in the neutralisation of meaning cannot be studied without a considerable relevance to a system of oppositions of which the given form is a part. It has been customary to say that grammatical forms make up an opposition if they have one grammatical feature in common and are contrasted by one or several points of their denotative content. The common element is the grammatical category itself revealed in the linguistic forms of its expression. Transposition is generally based on some points of the grammatical meaning which is retained though somewhat transformed thus producing the necessary effect in communication. This transformation may be of different kind. If, for instance, transposition results in yielding synonyms the latter are not interchangeable. As we shall further see, transpositions are always attended by the neutralisation of the contrasted grammatical meaning in special syntactic, lexical or situational environment where the given word-form occurs.