The document provides instruction on using the present simple tense in English. It discusses using the present simple to describe habits, facts, states and regular actions. It is considered the most common tense. The document then covers rules for adding 's' to verbs for third person singular subjects and provides examples of positive and negative sentence structures as well as questions. Adverbs of frequency are discussed along with the verbs 'to be' and 'to have'. Examples are provided to illustrate the concepts and reinforce the rules.