先说强调句,是最好判断的.一般形式为
It is ...that/who ...而且去除这个框架还是完整的句子.
比如,It is the black cat that eats the fish.
去掉it is和that,变为 The black cat eats the fish.也是完整句.
有引导词的是名词性从句.名词性从句分为四大类.
有先行词的是定语从句.
被定语从句修饰的词叫先行词.一般会放在关联词前面.
关联词有 who,whom,that,whose,which,as,when,where,why
比如说,I meet a girl who is a student.
girl就是先行词,who是引导从句的关联词.
你指的判断主语,应该是名词性从句里的主语从句吧.
主语可以是一个短语也可以是一个从句.
比如,What I like most is the weather here.那么主语就是What I like most ,一般主语都到动词为止.
主语是从句的,比如 That he got injured in the accident yesterday totally worries me.这里的主语就是That he got injured in the accident yesterday,指的是一件事.
一般判断的时候先把形容词啊,副词啊去掉吧.