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? 3. About the role the teacher plays ? 4. About the problems that will happen 。? Yao Ming is much taller than Pan Changjiang. ? Pan Changjiang is funnier than Yao Ming. ? Pan Changjiang is more outgoing than Yao Ming. ? Yao Ming is better at basketball than Pan Changjiang. ? Han Hong is heavier than Song Zuying. ? Song Zuying is thinner than Han Hong Students induce the rules of parative forms acc