track + ed =, tracked, trackked, traced, string + ing =, stringging, stringing, stringeing, scrape + ing =, scapeing, scraping, scrapping, skate + ed =, skateed, skatted, skated, fist + ful =, fisteful, fisteful, fistful, brave + ly , bravely, bravly, braveely, include + ed, includeed, included, includded, hope + less =, hopeless, hopless, hopeeless, demonstrate + ed =, demonstratted, demonstrateed, demonstrated, When a word ends in 'e' and you add a vowel suffix, you...., double the e and add the suffix, drop the e and add the suffix, just add the suffix.

Adding suffixes

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