You may look at this only from the "striking art" point of view. For a fist punch, palm strike, finger jab, your arm will move pretty much the same way. Whether you stand in your opponent's front door or side door, whether you and your opponent have the same side forward or different side forward, it won't make much different as long as your hand can reach to your opponent's face.
For hip throw and shoulder throw, your feet may move and turn exactly the same way, but your hand position are complete different.
For
- hip throw, one of your arm should warp one of your opponent's leading arms, your other arm should wrap your opponent's waist.
- shoulder throw, both of your hand should control your opponent's leading arm.
If your form has a body bending forward motion, without the detail hand movement, no matter how many times that you may train your solo form, you will never be able to apply either hip throw or shoulder throw.