English verb tenses, being the one of the most confusing things to learn, is best learned by dividing and conquering the beast. Once one splits the tenses into separate categories, it should be much easier to learn.
The three categories of English verb tenses are:
These categories, if taken one at a time, are like bits of a song. When a person learns a song, they lean it in chunks and stick it together to make something beautiful. You could also think of grammar as a necklace, and the tenses as beads that make it up. If neither of these metaphors work for you, think up your own. The point is that learning parts while thinking of the whole is helpful.