Tense and aspect are two distinct concepts. While tense denotes the time at which an action, state, or event occurs, aspect provides information ab...

Tense and aspect are two distinct concepts. While tense denotes the time at which an action, state, or event occurs, aspect provides information about the duration and completion of events. Concerning the English tense-aspect system, it is correct to affirm that:

twelve verb tenses emerge from the combination of four aspects and three tenses.

twelve verb tenses emerge from the combination of three aspects and four tenses.

the Future time is not a part of it, because verbs in the Future are not inflected.

the Simple Present adds many different inflections for the third person plural.

there are three aspects in English: the simple, the perfect and the progressive.