This document provides instruction on using the past simple tense in English. It covers:
1. Regular verbs in the past simple tense take the suffix "-ed" in the affirmative, such as "walked", "studied", and "played".
2. Examples are given of affirmative sentences using the past simple tense with subjects like "I", "she", "they", etc. and regular verbs.
3. Exercises are included to practice forming past simple affirmative, negative, and interrogative sentences with regular verbs.