a. so / such…as
Such people as were mentioned by him were honest. (as作主语)
I’ve never seen such a clever man as he is. (as作表语)
Last term our maths teacher set so difficult an (= such a difficult) examination problem as none of us worked out.
b. the same…as
Modern statemen are often faced with the same problem as defeated the ancient Romans. (as 作宾语)
I like the same book as you do. (as 作宾语)
As many children as came were given some cakes. (as 作主语)
He is as diligent a man as ever lived. (as 作主语)
如果写成定语从句的形式：I have as interesting a book as you have.
如果要用英语中的as引导的状语从句形式表达的话，就应该是：The book I have is as interesting as yours.
He found the dictionary there he was looking for. 他在那儿找到了他在找的词典。
I saw something in the paper which might interest you. 我在报上看到一样可能使你感兴趣的东西。
Something was going to happen that was to change the world. 当时有件事就要发生，这件事将改变世界的面貌。