在复合句中用作表语的从句是表语从句, 引导表语从句的关联词与引导主语从句的关联词大致一样,表语从句位于连系动词后,有时用as if引导。其基本结构为:主语 + 系动词 + that从句。 That’s what we should do. That’s why I want to see you. The reason for my absen...