1、Shanghai is such a big city==Shanghai is so big a city.
2、This is such an interesting book.== This is so interesting a book.
3、Such a good girl is she that we all like her.
4、Such a selfish man did Tom become that no one loved him any longer.
5、Such a wonderful sight did I watch last night.
6、It's so interesting a book that I have read it many times.
7、It's so heavy a box that I can't carry it .