I assume you have only the one hard drive in your PC. The partitions may still exist but entries for them may not have been written into Ubuntu's /etc/fstab file. To determine if the partitions exist, boot into Ubuntu and open up a terminal (Applications | Accessories | Terminal). Now enter the command "sudo fdisk -l /dev/sda" and press Enter. After typing in your user password and pressing Enter, you will get a list of all the partitions on the hard drive. Assuming you see all the original partitions (sda[1,5-9]), you'll need to look at the fstab file to see if there are entries for sda5, 6, and 9. If there are none, you'll need to figure out a place where they should mount (e.g. /windows/D, .../E, .../F) and add entries for them to fstab (hint: partition UUIDs are under /dev/disk/by-uuid/). The existing entries can guide you.
If the partitions do not exist or have been overwritten, then recovery is more complicated. The earlier-mentioned link is probably as good a place to start as any. Good luck!