一个关于不定式的问题，各位英语大神请进

Question

谁能详细讲讲 主语+系动词+表语+to do 这个结构啊 感激不尽

Answer 1

在部分表示感情色彩的形容词、过去分词或动词之后可接不定式，如：astonished,glad,happy,laugh ,pleased, sad,smile,sorry,surprised等。
①We are glad to hear the news.
②I was surprised to see that a three-year-old baby could write so well.
在部分形容词后接不定式，用主动形式表示被动意义，这种句型中的主语是不定式的逻辑宾语。如：The question raised by thestudent is difficult to answer.
The room is really comfortable to live in.
常这样用的形容词有：comfortable,easy,dangerous,difficult,expensive,fit,impossible等。

Answer 2

123

Answer 3

想起了
1. She is too young to go to school.
主 系 表 to do
2. He is experienced enough to handle this.
主 系 表 to do

应该还有别的类型。表语和后面to do 的事情有联系，比如表示某人的能力能否胜任某事等等。