The document outlines spelling rules for adding "-ing" to verbs in the present progressive tense. It explains that for one-syllable words ending in consonant-vowel-consonant, the final consonant is doubled before adding "-ing", unless the word ends in w, x, or y. For words of two or more syllables ending in consonant-vowel-consonant, the final consonant is only doubled if the last syllable is stressed. It also provides examples of applying these rules to form present progressive verb tenses.