1. While the kinds of instruction offered in these programs will differ, DL usually signifies a course in which the instructors post syllabi , reading assignments, and schedules on Websites, and students send in their assignments by e-mail.
【分析】本句为复合句。主句主干为 DL signifies a course。主句中的in which引导定语从句，对course进行解释说明，其中instructors和students是并列成分。 While意为 虽然，尽管 ，引导让步状语从句;从句中的offered 为过去分词做后置定语，修饰instruction。
2. Telling myself that I was merely an experienced writer guiding the young writer across the hall, I offered suggestions for characters, conflicts and endings for her tales.
【分析】本句为简单句。句子主干为I offered suggestions。Telling myself hall为伴随状语，that引导宾语从句;guiding the young writer across the hall为现在分词作后置定语，修饰writer。that 后的从句可改写为I was merely an experienced writer who are guiding the young writer across the hall。