课堂设疑是师生信息双向交流的过程 ,恰当的课堂设疑能激发学生兴趣 ,启发学生思维 ,提高课堂教学效率。而教学实践证明设疑的时机选择直接关系着启发的效果 ,为问而问 ,信口开河地随意设问 ,都不能达到启发思维的目的 ,那么如何把握设疑的时机呢 ?笔者认为可以从以下几处设疑 Classroom suspicion is the process of two-way communication between teachers and students. Proper classroom suspicion can stimulate students’ interest, inspire students’ thinking, and improve classroom teaching efficiency. The teaching practice proves that the timing of questioning is directly related to the effect of enlightenment. Asking questions and asking questions freely will not achieve the purpose of inspiring thinking. How do you grasp the timing of questioning? Department of doubt