2. The flies are on the book.
* On the book there are the flies
4. A man with a gun stood in the doorway.
-In the doorwax there is a man with a gun stood
5. Although she is young, she knows a great deal.
+ Young as she is , she knows a great deal.
6. Although he studies hard, he makes little progress.
+ Hard as he studies , he makes little progress.
7. If you were a fish, the cat would eat you.
- Were you  a fish ,  the cat would eat you.
8. If your father had known this, he would have given you advice.
+Had your father known this, he would have given you advice.
9. If you should need my help, phone me at once.
Should you need my help, phone me at once.