... expression of a topic should be subjective“ ”, and there are many ways of expressing the topic of discourse, and there is no such a thing as one correct expression of the topic for any fragment of discourse. In ... therefore, is the main cause of many traffic accidents. Drink-driving should be considered as the enemy of drivers. If - 2 - AbstractIn this thesis ,some discourse features of English Sale Contract ... corresponding to type of cohesive device.In chapter I we will deal with the definition of discourse and discourse analysis, spoken and written discourse, discourse context, discourse topic, cohesion...