This document provides information about the simple present tense in English. It discusses when to use the simple present tense, the form of sentences in the simple present tense, and rules for adding "-s" to verbs in the third person singular. Specifically, it notes that the simple present tense expresses repeated or usual actions like habits or schedules. It gives examples of affirmative, negative, and question sentence structures. Finally, it outlines rules for changing verb endings for the third person singular, including changing "y" to "i" before adding "-es".