General Classifications

X may be divided into

three main

classes sub-groups categories

X may be classified

on the basis of according to depending on in terms of

Y

into Xi and Xii

Bone is generally classified into two types: cortical bone, also known as....., and cancellous bone or......
Aristotle's systematic treatises may be grouped in several divisions: logic, psychological works, physical......
The works of Aristotle fall under three headings: (1) dialogues and......; (2) collections of facts and......; and (3) systematic works. There are two basic approaches currently being adopted in research into X. One is the Y approach and the other is.....
Associative learning can be categorised into classical and operant conditioning. Classical conditioning was first......
Generally, spectratyping provides two types of information: band intensity pattern and band number.

Specific Classifications:

In the U.S. system, X is graded

according to whether..... on the basis of...... in terms of

Smith (1966)

divided classified grouped

Xs

into two broad types: Xi's and Xii's

Thomas and Nelson (1996) describe

four basic types of

validity: logical, content, criterion and contruct.

Smith and Jones (2003) argue that there are two broad categories of Y, which are: a)...... and b)....
For Aristotle, motion is of four kinds: (1) motion which......; (2) motion which......; (3) motion which......; and (4) motion which.......

Introducing Lists:

The key aspects of management can be listed as follows:
There are three reasons why the English language has become so dominant. These are:
There are two types of effect which result when a patient undergoes X. These are......
Appetitive stimuli have three separable basic functions. Firstly, they....... Secondly, they......

The disadvantages of the new approach can be discussed under three headings, which are:......
This topic can best be treated under three headings: X. Y and Z.

This section has been included for several reasons: it is......; it illustrates......; and it describes.......

The "Mass for Four Voices" consists of five movements, which are: the Kyrie, Gloria, Credo, Santus and Agnus Dei.
The "Three Voices for Mass" is divided into six sections. These are: the Kyrie, Gloria,.......

Refering to other people's lists

Smith (2003) suggests three conditions for its acceptance. Firstly, X should be..... Secondly, it needs to be.... Thirdly,.....
Smith and Jones (1991) list X, Y and Z as the major causes of infant mortality.
Smith and Jones (2003) argue that there are two broad categories of Y, which are: a)...... and b)....
For Aristotle, motion is of four kinds: (1) motion which......; (2) motion which......; (3) motion which......; and (4) motion which.......
Smith (2003) lists the main features of X as follows: it is X; it is Y; and has Z.

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