The lecture discusses the position of adverbs in English, outlining three main positions: at the front, middle, and end of sentences, with examples for each. It elaborates on rules governing adverb placement with main verbs, 'be' verbs, auxiliaries, and modals, as well as adverbs modifying other adverbs or adjectives. The document emphasizes flexibility in adverb placement for clarity and emphasis, providing numerous examples throughout.