This document provides an overview of the simple past and present perfect tenses in English. It defines the simple past tense as using regular verbs ended in "-ed" or irregular forms to describe actions fully in the past. The present perfect tense is formed using "have/has" plus the past participle to describe actions that began in the past but are still relevant to the present. Examples are provided to illustrate the differences between the tenses when recounting past experiences versus describing ongoing situations.