There are simple and continuous forms of the past, present and future tenses (and the perfect tenses!).
present continuous (EF)
present perfect simple & continuous (BC)
future continuous (BC)
Used to show a link between the past and the present. The focus is on what happened, not when it happened.
Present perfect is used to talk about:
exercises (Oxford)
These four words are used to talk about events at different times, and are often confused.