Potentially, Greek verbal entries are characterised for the following features: Finiteness, Verb-form/Mood, Tense, Person, Number, Gender, Aspect and Voice.
Depending on the combination of these features, all inflected forms of the Greek verbal system can be generated. The combination of the features is dependent upon constraints, resulting, in certain cases, in the total absence of certain features or the exclusion of certain values. More information on these constraints is given in the following sections.
The Greek verbal system presents both simple and compound forms. Compound forms are the result of two different combinations:
In the following tables, compound forms and the appropriate values and tags that should be assigned are put in parentheses, given that their recognition requires the use of a multiword tagger.