Lexically fixed forms like morphemes,words,idioms are substantive constructions,while partially lexically filled and fully abstract phrasal patterns are schematic constructions.

The author introduced this method of composition into produce of aerobics.

(Swales s) Genre Analysis theory is applied to examining the following three aspects of the abstract: schematic structure, tense & voice,syntactical and lexical features The paper addresses the conventionality of abstract so that the members in the discourse community may grasp and apply the mechanism of the abstract in their own writing.

Different communicative purposes and functions determined different schematic structures of different genres.

After the three teaching steps of genre analysis, comparative analysis and writing practice, students will get the cultural knowledge of the texts, gain the schematic structure and obtain the language strategies, so that they can thoroughly understand and correctly write various business English texts.