Terence is, of course, correct. Because you have not responded to him, you may need more detailed help.
ekreft wrote: ... I don't know what to do...
(1) Close everything.
(2) Open your User Pictures folder:
(3) Control click on the iPhoto Library in the Pictures folder
and then select "Show Package Contents":
(4) Inside the Package you will find aliases
to the Originals and Modified images:
(5) Clicking one will open either the Masters or Previews folders
respecively. They contain your images in organizing folders:
(6) Navigate the organizing folders inside to find the images you want
and copy them to a new location.
(7) If desired, you can them import the image copies into the
iPhoto Library you are creating or repairing:
(8) When you are satisfied, backup your iPhoto Library.