Here's a breakdown of the twelve tenses:
Simple Tenses
* Present Simple: I walk, you walk, he walks, etc.
* Past Simple: I walked, you walked, he walked, etc.
* Future Simple: I will walk, you will walk, he will walk, etc.
Continuous Tenses
* Present Continuous: I am walking, you are walking, he is walking, etc.
* Past Continuous: I was walking, you were walking, he was walking, etc.
* Future Continuous: I will be walking, you will be walking, he will be walking, etc.
Perfect Tenses
* Present Perfect: I have walked, you have walked, he has walked, etc.
* Past Perfect: I had walked, you had walked, he had walked, etc.
* Future Perfect: I will have walked, you will have walked, he will have walked, etc.
Perfect Continuous Tenses
* Present Perfect Continuous: I have been walking, you have been walking, he has been walking, etc.
* Past Perfect Continuous: I had been walking, you had been walking, he had been walking, etc.
* Future Perfect Continuous: I will have been walking, you will have been walking, he will have been walking, etc.
It's important to note that some grammarians argue for a more nuanced understanding of English tenses, and there are also additional nuances to consider regarding how these tenses are used in specific contexts.