The document discusses basic grammar patterns in English including the three sentence structures: subject-intransitive verb, subject-transitive verb-complement, and subject-linking verb-subject complement. It defines key terms like subjects, verbs, complements, and linking verbs. Examples are provided to illustrate intransitive verbs that do not take a complement, transitive verbs that require a complement, and linking verbs that show a relationship between the subject and a describing complement. Compound subjects and predicates as well as active and passive sentences are also summarized.