This document discusses the present simple tense in English. It separates verbs into two categories: forms of to be, have, and modal verbs, which do not require an auxiliary verb in questions and negatives, and all other "lexical verbs" which do require an auxiliary verb like do/does. It provides examples of using the present simple for habitual actions, permanent states, and general truths/laws. Signal words that can indicate the present simple tense are also mentioned.