A conjugated verb is a verb that has been changed from its base form to express tense, person, number, aspect, mood, and voice. For example, a different form of the same verb is used to show when an action takes place, to agree with the person (who could be first, second, or third person), to agree with a singular or plural subject, etc: I walk to school every day. / I walked to school yesterday. / He walks to school. / We walk to school. In the first two sentences, the verb walk is used in the present tense (walk) and past tense (walked). In the last two examples, the verb walk is used to agree with the third person singular (walks) and first person plural (walk).
When we conjugate a verb, we list the different forms of the verb according to the following grammatical categories:
Number – Verbs have two numbers: singular – the dog barks; plural – the dogs bark
Aspect – All verbs have both tense and aspect. Each tense is subdivided into aspects. The different combinations of tenses and aspects make possible aspects such as simple, progressive, perfect, and perfect progressive. These aspects tell us whether the actions are continuous, completed, or both continuous and completed. (More on Aspect of Verb)
Mood – Verbs can be in one of the three moods: indicative, imperative, or subjunctive. (More on Moods of Verb)
Voice – Verbs can be in the active voice or the passive voice (SeeLesson 15)