The document discusses the present continuous/progressive tense in English. It explains that the present continuous is formed using the verb "to be" plus the main verb in its present participle ("-ing") form. It then provides rules for forming the present participle of different types of verbs by adding "-ing": (A) regular verbs, (B) verbs ending in "e", (C) monosyllabic verbs ending in a consonant, (D) verbs with multiple vowels, (E) verbs where the stress is on the last syllable, (F) verbs where the stress is on the first syllable, and (G) verbs ending in "ie". It notes some common verbs like "know"