名词性从句2一、引导词选用原则：“缺什么补什么”原则缺主语，指人用who, 指物用what缺宾语，指人用whom/who, 指物用what缺时间状语用when；缺地点状语用where；缺原因状语用why；缺方式状语用how；定语用whose或which；什么都不缺用that或whether（是否）。二、主语从句：在句子中作主语的从句，就是主语从句。引导词：1. 从属连词 that, whether；2. 连接代词 who, what, which，whoever, whatever, whichever;3. 连接副词 when, where, how，why填空练习1：1. (_ is needed for success) is your hard work.2 .(_ they will arrive ) has been told to the teacher.3. (_ we will go tomorrow ) hasnt been decide
