Questions about some sentences

[novemberfog]

1) ”在所有的画里面，曹霸最喜欢话吗了，有的。。。，有的，。。。“

In this sentence, what is the meaning or use of "所"? Why is it in there? I think I can understand it without "所". Does it indicate a special meaning or mark a special grammatical function?

2) 后来杜甫的诗演变为成语“别开生面”，比喻另外开创新的局面。

What is meaning and function of 为 in the sentance, and then what does that idiom mean. Text said it comes from a line of poetry of Du Fu's, when he said 将军下笔开生面 about Cao Ba's paintings. I understand what Du Fu said, but I don't understand the idiom up above.

If anyone can help I'd appreciate it.

[skylee]

1) 所有 = all; 在所有的畫裡面 = in all the paintings

2) 為 = to (change to / become ); 演變為 = evolve to

As to what the idiom means, take a look at this -> Bie Kai Sheng Mian

[novemberfog]

Thank you for the explanations and link, I can understand now!