... Spelling of –ING and –ED, revised and adapted from Understanding and Using English Grammar, Betty Schrampfer Azar _ Lê Xuân Hồ Spelling of –ING and –ED, revised and adapted from Understanding ... adapted from Understanding and Using English Grammar, Betty Schrampfer Azar _ Lê Xuân Hồ SPELLING OF THE –ING AND –ED FORMS Consonant: phụ âm; Vowel: nguyên âm -ING Rules -ED Rules Verbs that ... the word ends in a vowel and a consonant, double the consonant and then add –ing Note 1: If the word has more than one syllable and is not stressed at the last syllable, don’t double the...