### aggregation | category | verb:

Active verb
* are the key when writing cover letters and resumes.
* mean action.

### aggregation | category | verb | auxiliary verb:

Modal
* are similar to catenative verbs in that they express the same ideas
  - sometimes confused with auxiliary verbs
* is an auxiliary verb

English verb
* Most English verbs have two voices, the Active and the Passive.
* Some English verbs have two objects.

Infinitive
* are verbals.
* function as nouns, adjectives, and adverbs.
* have qualities of both verbs and nouns.
+ Esperanto, Grammar, Verbs
  * Verbs end in '-as' when they are in present tense. English uses 'I am', 'you are', 'he is'. But in Esperanto, there is just one word for 'am', 'are', 'is' - 'estas'. Similarly, 'kuras' can mean 'run' or 'runs'. Infinitives end in '-i'. For example, 'esti' means 'to be', 'povi' means 'can'.

Irregular verb
* Some irregular verbs change their stem in the present tense, indicative mode.
* are unpredictable in form because they are memorized as individual words
* come from assimilation with other tongues.
* form the past participle by using a verb stem unique to each verb
  - tense and past participle in a variety of ways

Japanese verb
* Some Japanese verbs are more specific when describing actions than English verbs.
* are far simpler than English verbs.

Latin verb
* Most Latin verbs have four principal parts.
* can be one of six tenses.

Participle
* are forms of the verb that function as adjectives
  - parts of speech
  - verb forms and, hence, control the reader's perception of an action
* are verbal adjectives which modify nouns
* can either be past participles or present participles and they act as an adjective.
* govern the same case as their verbs.
* have three functions in sentences.
* modify nouns and pronouns and can precede or follow the word modified.

### aggregation | category | verb:

Phrasal verb
* are especially common in informal English
  - word groups that include a verb combined with a preposition or an adverb
* consist of a verb and another word or phrase, usually a preposition.
* tend to have a life of their own.
* work in strong relation with the context of the sentence.
  * I have learnt English as a foreign language myself. In my opinion, it is best to avoid such 'phrasal verbs'. Not olny are they hard to understand for most learners, they have several meanings. Phrasal verbs tend to have a life of their own. This is something which precludes them to be the tool of the foreign language learner. My personal opinion is to tell things as clearly as possible. Perhaps add another sentence or two explaining difficult passages where they can not be avoided. And avoid the situation that the reader feels belittled. The readers might be very bright people, whose only problem is that they can not speak or understand English well.

Polish verb
* can have active, passive or reflexive forms.
* have personal and impersonal forms.

Present participle
* appear at the front of word groups that modify nouns or pronouns.
* are participles.

Reflexive verb
* are verbs where the action is done to oneself, common in most European languages.
* require a pronoun in front when they are conjugated as single-word verbs.

Strong verb
* are verbs of action
  - words like agree, receive, analyze, inquire, announce, replace, assume, etc
* form the past and past perfect by changing their vowels.