1.When we will start is not clear.2.Mrs Black wont believe that her son has become a thief.3.My idea is that we should do it right now.4.I had no idea that you were her friend.主语从句主语从句宾语从句宾语从句表语从句表语从句同位语从句同位语从句I名词性从句的种类名词性从句的种类在英语的句子结构中，本来该由名词充当的主语、宾语、表语和同位语，由一个句子来充当,这个句子就叫名词性从句。什么是名词性从句什么是名词性从句?名名词词性性从从句句主语从句(The Subject Clause)宾语从句 (The Object Clause)表语从句 (The Predicative Clause)同位语从句 (The Appositive Clause)主语从句主语从句在复合句中作主句的主语在复合句中作主句的主语.引导词有连词引导词有连词that(that 不可省略不可省略),whether;连接代词有连接代词有who,wh
