The document discusses the present simple tense. It is used for repeated or regular actions in the present time period, such as habits and routines. The spelling of the verb changes in the third person singular, adding -s or -es depending on the verb. The present simple tense is also used for habitual actions, universal truths, feelings and thoughts, and fixed future events. It provides examples of affirmative, negative, and interrogative sentences in the present simple tense. Common expressions using this tense include news headlines, storytelling, exclamatory sentences, and imperative sentences.