Present perfect vs. past simple

This document provides a summary of the differences between the present perfect simple tense and the past simple tense in English. It outlines the affirmative, negative, and interrogative forms of each, including common time expressions used with each tense. Examples are provided to illustrate the key uses of each tense, such as the present perfect for actions that began in the past but are still relevant or ongoing, and the past simple for actions that were completed entirely in the past. Guidance is given on using the present perfect and past simple with phrases like "since", "for", "been to", and "gone to".