This document provides information on English grammar tenses including the present simple, present continuous, past simple, and past continuous. It outlines the structure, examples, and usage of affirmative, negative and question forms for each tense. Key points include how verbs are conjugated for third person subjects and irregular verb forms in the past simple tense. The explanations discuss when to use each tense to express habitual present actions, ongoing actions, completed past actions and past ongoing actions.