The present simple tense is used to describe general facts, repeated actions and habits, and things that are always true. General facts use the present simple with subjects like "I", "they", and proper nouns. Things that are always true are stated as general truths. Repeated actions and habits use adverbs like "often" and "usually" along with present simple verbs. When forming the third person singular present simple, verbs ending in consonant-vowel-consonant or y add -es, while other verbs simply add -s.