The present simple tense is used to describe habits, routines, facts, and general truths. It is formed using the base form of the verb. For example, in the third person singular (he, she, it), we add -s or -es to the base form of the verb. For example: "She plays the piano." It's also used for scheduled future events and to talk about things that are always true. For example: "The sun rises in the east."