A verb indicates the time of an action, event or condition by changing its form. Through the use of a sequence of tenses in a sentence or in a paragraph, it is possible to indicate the complex temporal relationship of actions, events, and conditions There are many ways of categorising the twelve possible verb tenses. Aspect Verb tenses may also be categorised according to aspect.
Aspect refers to the nature of the action described by the verb.
A verb in the indefinite aspect is used when the beginning or ending of an action, an event, or condition is unknown or unimportant to the meaning of the sentence. The indefinite aspect is also used to used to indicate an habitual or repeated action, event, or condition. A verb in the complete aspect indicates that the end of the action, event, or condition is known and the is used to emphasise the fact that the action is complete. The action may, however, be completed in the present, in the past or in the future. A verb in the continuing aspect indicates that the action, event, or condition is ongoing in the present, the past or the future.