Respuesta:
base words: sing, eat, play, read, swim, cook, do, book, quick, exercise, high, stand, happy, act, teach
Suffixes: ful, ment, en, ing, s, ly, ed, er
New words: sings, eating, played, reading, swiming, cooking, doing, booking, quickly, exercising, higher, standing, happier, acting, teaching
Espero te funcione.
