| Form (eat) | Infinitive | -ing (Participle I and Gerund: morphologically are the same) | Participle II | ||
| Active | Passive | Active | Passive | ||
| Simple | (to) eat | (to) be eaten | eating | being eaten | E A T E N |
| Continuous | (to) be eating | __ | __ | __ | |
| Perfect | (to) have eaten | (to) have been eaten | having eaten | having been eaten | |
| Perfect Continuous | (to) have been eating | __ | __ | __ |
Infinitive includes 4 general Forms, 2 of which are used in Active and Passive and 2 only in Active (in sum total 6):
a) 2 units (Active and Passive) of Simple (Present) Form;
b) 2 units (Active and Passive) of Perfect Form;
c) I unit (Active) of Continuous Form;
d) 1 unit (Active) of Perfect Continuous Form.
-ing Form (Gerund and Participle I) includes 2 Forms in Active and Passive (in sum total 4):
a) 2 units (Active and Passive) of Simple Form;
b) 2 units (Active and Passive) of Perfect Form.
There can not be any Continuous (Perfect Continuous) Form for the ing Form primordially expresses certain longevity and emphasizes the process as it is.
Participle II has only one form in all the cases.
Traditional Paradigm seems to be logic if we classify the forms on the ground of the principle Morphological Form. Though when we analyze the forms being led by the Principle of Syntactic Function, Gerund and Participle should be distinguished for the former can be used in the Sentence as the Predicate and Predicative (syntactic propriety of the Noun) and the latter can be used as a certain Attribute or in Predicative Complexes (propriety of the Adjective and the Verb). Though in such division there, firstly, will be a morphological confusion and, secondly, Past Participle (Participle II) appears to be unique as no other verbal form can be used in such aspect.