The document discusses the rules for forming the past tense of regular verbs in English. It explains that most regular verbs are formed by adding "-ed" to the base form of the verb. It provides examples like "brush + ed = brushed." For verbs ending in "e," only the letter "d" is added. For single-syllable verbs ending in a consonant, the final consonant is doubled before adding "-ed." Verbs with two syllables and stress on the second, follow the same doubling rule. The document provides many examples to illustrate the patterns for forming the past tense of regular verbs in English.