教学内容:四种命题间的形式关系教学目的:使学生了解命题的四种形式及其相互关系;能写出一个命题的逆命题、否命题、逆否命题。讲授形式:问问答答、以旧引新;讲讲练练、以新习旧。课堂程序: 一、复习 1.提问:什么叫命题?命题由哪几个部分组成? 学生回答后,在黑板左边制作表格,添入:命题、题设、结论; Teaching content: The formal relationship between the four propositions The purpose of the teaching: To make students understand the four forms of the proposition and their mutual relations; to write a proposition of the reverse proposition, no proposition, inverse proposition. Lecture forms: Q&A, old introduction, lectures and new habits. Classroom procedures: First, review 1. Question: What is the proposition? What are the parts of the proposition? After the students answer, make a form on the left side of the blackboard, add: propositions, questions, conclusions;