The document discusses rules for forming the -ING form of verbs in English. It explains that for many verbs you simply add -ING to the base form. For verbs ending in -e, you drop the -e and add -ING, except for verbs ending in -ee and -ie. For verbs ending in -ee you just add -ING, and for verbs ending in -ie you change the -ie to -y before adding -ING. It also discusses rules for verbs ending in one vowel and one consonant, and two-syllable verbs, including doubling the final consonant in some cases before adding -ING.