Discourse can be classified into four main types: descriptive, narrative, expository, and argumentative. Descriptive discourse involves using language to create a vivid picture or description through imagery and details. Narrative discourse tells a story by arranging related events in chronological order. Expository discourse provides explanation and clarification using examples, illustrations, comparisons, definitions, and other rhetorical devices. Argumentative discourse aims to persuade an audience by presenting opinions on a contentious topic and attempting to convince them to either accept or reject those opinions.

2. Discourse is a coherently-arranged, serious and
systematic treatment of a topic in spoken or written
language.
It constitutes the categories of academic writing
aimed at teaching students the method of organizing,
narrating and giving detailed description of events
in expository paragraphs.

3.  Discourse may be classified into descriptive,
narrative, expository, and argumentative.
 Descriptive Discourse
A descriptive discourse often takes two forms;
it can be in static form, or the form
called process description.
The static description draws a verbal picture
using words that appeal to the senses, while
the process description tends to explain the
various degrees or levels of advancement
involved in carrying out a task.

4.  Again, static description may either be
the technical or the imaginative form.
 The technical form gives a lucid description and
objective delineation of details; whereas,
the imaginative uses suggestive words and
connotations Opens in new window to create a
dominant effect about the subject being
described.
 Thus, we may have an equipment being
described technically by thoroughly giving details
of its parts and the functions of such parts, or
imaginatively — where figures of speechOpens in
new window and associated connotations are
used to describe it.

5.  A narrative discourse is that which in its
description, portrays causally related
incidents; here the occurred incidents are
often arranged one after another in an order
of chronology.
 The narrative discourseOpens in new
window in its typical form is often referred to
as fiction; this is because it both provides a
highly detailed and structured conception
of anecdoteOpens in new window

6.  An expository discourse consists in giving
definitive explanation and clarification by
means of examples and illustrations,
details, comparison and contrastOpens in
new window, definition, and other rhetorical
devices of like nature.

7.  Argumentative Discourse
 The argumentative discourse is used with the
sole purpose of persuading the audience
(hearers or readers) to either accept or reject
opinions.
 As a primary prerequisite, argumentative
discourse only takes effect where there is a
contentious or controversial topic.