1. It作先行主语和先行宾语的一些句型
She had said what it was necessary to say.
2. 强调句型
It is not who rules us that is important, but how he rules us.
3. "All+抽象名词"或"抽象名词+itself"(very+形容词)
He was all gentleness to her.
句型简介：
句子的结构类型。根据构成句子的语词的不同类别、序列、搭配方式等等，汉语的句子类型可分为主谓句、非主谓句、被动句、倒装句、兼语句、连动句等。句型研究是句法研究的重要内容之一。