名词性从句, 定语、状语从句名词性从句 1. 主语从句 That he will come to the discussion is certain. Whether it will do us harm or good remains to be seen. How he managed to accomplish the job is of interest to us all. When and where we shall do the test is still in question. Why she left me is still a mystery to me.为了避免头重脚轻， It 做形式主语 Itsnecessary/important,clear+that- clause Itsreported/believed/said/supposed +that-clause It+be+N+that-clause Itsafact/surprisethat 4.It+VI+that-clause Itappears/happens/occurredtome/turne
