Synchronic & Diachronic Investigations Of Uncertainty Speculated Adverbs

Speculated Adverbs differ greatly from other adverbs. This paper tries to study the Adverbs mean"Uncertainty Speculated". We classified these words into two kinds according to cognitive style (based on sensory and based on introspection), then investigated their syntactic features, semantic and pragmatic function in synchronic plane, and studied their path and mechanisms of grammaticalization in diachronic plane, the use of structuralism, cognitive grammar, semantic and pragmatic theory, grammar theory and discourse markers and other grammatical ideas and research methods, attempts to reveal the common syntactic differences and the grammatical trend of Uncertainty Speculated Adverbs.The paper mainly includes two parts:Firstly, the comparison of Uncertainty Speculated Adverbs in synchronic plane. First, we investigated the syntactic features of Uncertainty Speculated Adverbs, investigated and summarized on the "position and independence situation ", "syntax collocation situation", "adverb collocation situation" respectively; and then through the semanteme , semantic meaning to point and certainly not the definition of these three areas and were conducted on two types of semantic aspects of word study; Finally, in pragmatic terms, we focus on the study of "functional expression and emphasis," "Propaganda and Mass doubt function" and "discourse marker functions."Secondly, we were on the "as if", "seems," " alike," "may," "probably" and "approximately " trajectory of the syntax of the full description and syntax of the mechanism were carried out its investigation, the last attempt explained the synchronic differences based on the studies in diachronic plane.