Verb form charts can help give you a comparison of different tenses. Here are a number of resources that will help you improve your understanding of how verbs are used in a different tenses:
Verb Formation Chart - Quick explanation of each tense, followed by examples and links to more detailed information.
Visual Guide to Tenses - Each tense is shown visually on a timeline to indicate when to use the tense
Tense in English - Simple explanations of each tense, with examples - perfect for beginners
Verb Types - Discussion of how verbs can be used in various patterns including the infinitive and gerund
One Page Verb Overview - One page chart that shows all the tenses of English on a timeline