Verbs in Georgian can be classified syntactically and morphologically.

Morphological classification involves describing the rules of verb derivation and verb conjugation.
In the Georgian grammatical tradition,  two main classifications have been proposed by Arnold Chikobava and Ak’ak’i Shanidze. Chikobava and his followers consider the transitive/intransitive and dynamic/stative distinctions to be the main classificatory morphological category of the Georgian verb. In the school of Ak'ak'i Shanidze the criterion is voice. Morphological patterns of verbs, types of conjugation, as well as syntactical constructions, are differentiated according to the voice.

Syntactic classification involves describing the case markings of the subject and objects of the verb.
Syntactic classification is quite simple. Morphological classification is bit more complex. The main schemes are given below.

Syntactic classification
There are three verb classes, corresponding to the three clusters of case marking and person/number marking, distinguished in Georgian. These three groups are presented below. For a substantial number of the verbs following pattern (B), the semantic correlate active subject is appropriate, also called direct verbs; e. g.:

kaci aSenebs saxls (A man builds a house)

	Subject	Verb	Object
I series	kac-i (Nom.)	aSenebs	saxl-s (Dat.)
II series	kac-ma (Erg.)	aaSena	saxl-i (Nom.)
III series	kac-s (Dat.)	auSenebia	saxl-i (Nom.)

Inversive verbs behave according to pattern (C) and may be characterized as having experiencer subjects. They are not agentive: the subject does not act by itself but it is rather the target of some incoming emotion or stimuli (cf. also Inversion).

kacs unda wyali (A man wants water)

	Subject	Verb	Object
I series	kac-s (Dat.)	unda	wyal-i (Nom.)

The remaining verbs follow the pattern (A) and are not distinguished by those parameters. The term used for such verbs is neutral verbs (in Western linguistics) or passive verbs (Georgian grammar tradition).

kaci Tbeba (A man is warming (himself))

	Subject	Verb
I series	kac-i (Nom.)	Tbeba
II series	kac-i (Nom.)	gaTba
III series	kac-i (Nom.)	gamTbara

More about syntactic classification
 

Morphological classification
The voice of a verb determines the type of verb conjugation, as well as the way how new lexical forms can be derived from the given verb form.
The rules of verb derivation describe how a verb can be formed from another verb or from a nominal, and how verb can form participles and masdars (nominals denoting an action expressed by the corresponding verb).

Some examples of derivation:
Verb formed from nominal:
Nominal: Savi shav-i > Verb: a-Sav-eb-s a-shav-eb-s

Savi  shav-i - black
a-Sav-eb-s a-shav-eb-s:
1.He (/she/it) makes it black (Future: ga-a-Sav-eb-s ga-a-shav-eb-s);
2. He (/she/it) is doing (does) something against rules (Future: da-a-Sav-eb-sda-a-shav-eb-s).

Savi  shav-i - black
Savdeba shav-d-eb-a:
1. It is becoming black (Future: ga-Sav-d-eb-a ga-shav-d-eb-a);
2.Crime is being done (Future: da-Sav-d-eb-a da-shav-d-eb-a).

Tbeb-a > a-Tb-ob-s > a-Tb-ob-in-eb-s
tbeb-a > a-tb-ob-s > a-tb-ob-in-eb-s
He (/she/it) is becoming warm >He (/she/it) makes him(/her/it) warm > He (/she/it) makes him(/her/it) warm it.

a-keT-eb-s > keT-d-eb-a
a-k'et-eb-s > k'et-d-eb-a
He (/she/it) is doing it; making (does; makes) it > It is being done; It is being made.

Some ways of verb derivation (Voice, Version and Contact) are discussed in the corresponding parts:
Voice of verb in Georgian
Version
Contact

The rules of verb conjugation describe how one verb can change its form by number and person within one screeve (tense/aspect/mood form) and how the verb form can produce the forms of different screeves.

Verb inflection (form changes) by person and number was discussed in previous parts.
The rules of screeve forming make several types of conjugation in Georgian. These types will be touched upon after the part about Derivation because as is mentioned above, the voice of the verb determines its conjugation type, as well as the way how new lexical forms are derived from the given verb form.

More about Types of conjugation