主题句与推展句

主题句

主题句是表达段落主题的句子，它概括段落大意，确保其他文字围绕它展开。例如，"My mother has passed along certain rules for getting along with others. These include: Don't argue with parents, children, spouses, or strangers." 这个段落的主题句强调了母亲传递的规则，推展句详细说明了这些规则。

主题句的位置

主题句通常位于段落开头，明确问题并加以阐述。它使文章结构清晰，增强说服力，便于读者快速把握主题和理解段落内容。例如，在段落中："Our life today depends very much on energy. In towns and villages, energy is essential for heating, lighting, communication, and transportation." 主题句开篇点明了能源的重要性。

如何写好主题句中的关键词

关键词要具体，既控制段落发展，又说明发展方法。例如，"depends very much on energy" 和 "no one can avoid being influenced by advertising"。准确的关键词是表达段落主题和写好主题句的关键。

推展句

主要推展句

主要推展句围绕段落主题展开，每个推展句独立，但相互连接。例如，"There are several factors affecting climate, including the amount of sunlight received, altitude, ocean impact, and atmospheric circulation."

次要推展句

次要推展句进一步分析或举例说明主要推展句。例如，"For me, teaching is not easy. Red-eye because I'm never ready to teach, sweaty-palm due to nervousness before entering the classroom, and sinking-stomach after leaving convinced of my boredom."

主要推展句与次要推展句的关系

主要推展句与次要推展句遵循三个部分规则：每个主要推展句解释关键词，次要推展句说明主要推展句。例如，"English is an international language because it's spoken by pilots, used in world mail, world radio programs, former British colonies, and members of the International Language Society."

写好推展句的方法

确定主题句和关键词后，选择与主题相关的信息和素材。采用“为什么-因为”方法展开句子，例如，"Why can we say English is an international language? Because it's used in various domains."

通过这些方法和示例，我们可以更直观地理解如何在文章中运用主题句与推展句，以达到高效表达和清晰逻辑的目的。