Tenses enable us to talk about the time and process of our actions and events; they also help us to discuss the accurate state or condition of the people or things we’re talking about.

Thus, the correct use of tenses is of central importance to the correct use of English sentences in speaking and in writing.

If you're a student, you need to learn the correct use of tenses to be able to solve English objective questions in your exams.

https://www.youtube.com/watch?v=2LqHJ5DGm88