考研英语中，语法是一个重要的部分，以下是一些关于英语语法的要点：
插入语从句构成
表语从句位于主句的连系动词之后，在非正式文体中，引导词that可以省略。例如：
That’s not what I want.
That’s why I have come.
My opinion is that things will improve.
形容词后的that从句
that引导的名词性从句还可以用在一些形容词后面，这种句型一般都用人作主语，所用的形容词都是表示思想状况或感情色彩的形容词，例如：
Certain that he would succeed, he started the project.
Afraid that he would fail, she took extra precautions.
高级替换词汇和短语
名词替换：
people → individuals, characters, folks
thing → affair, business, matter
动词替换：
think → harbor the idea that, take the attitude that, hold the view that, it is widely believed that
分词作宾语补足语
例如：
I saw him fighting with a girl.
I saw him beaten by a girl.
定语从句
例如：
This near tripling of oil prices calls up scary memories of the 1973 oil shock, when prices quadrupled, and 1979~1980, when they also almost tripled.
这些语法点可以帮助你在考研英语中更好地理解和分析长难句，从而提高作文和阅读理解的分数。建议在复习过程中多做练习，巩固这些语法知识。