This creative project has presented a computer-aided instruction game which teaches English past tense and past participle verb forms to students of English as a Second Language (ESL). The game portrays a graphics display of the learner facing a green, sharp-toothed creature.learner cannot accurately and consistently produce past and participle forms of randomly selected verbs, the display of the creature devours the learner's display. If the learner cannot accurately and consistently produce past tense of the creature devours the learner’s display. If the learner successfully produces such forms, the opposite happens; the learner’s display swallows the green monster. The game is entitled Monster.Programmed in Applesoft Basic, Monster includes review sections on English verbs. It also includes an auxiliary program to read student scores.