This episode is about Unit 4 (Entertainment) of the 2nd module (Colorful life) in first semester of higher-school English. Adverbial Clauses of Time is the main grammar point of this unit. Several points of view are shown here: common and special guidewords, the comparison between guidewords that have same meaning but different usages (till & until， when & as & while & whenever). Some phrase analyses and main vocabularies explanations are also included.

本集围绕第一学期模块二（Colorful life）中的第四单元（娱乐Entertainment）对娱乐生活探讨。本讲主要介绍本单元的语法点：时间状语从句。通过以下几个方面诠释：时间状语从句及其常用和特殊的引导词介绍，常用引导词中意义相近的引导词的用法对比（包括till & until， when & as & while & whenever）。讲解中融合一些词组辨析和单词对讲解。