The piece begins with group 1 which is an asymmetrical binary form. It ends on a PAC which then goes into a short transitional section into group 2. In group 2 we are in the dominant key. This section ends on a HC in the original key. It then repeats the expository section. In the developmental section you can tell that group 1 is being developed. The development goes through several keys, and by that it is retransitioned back into the recapitulation with a half cadence in the original key. The recapitulation begins in the sub-dominant rather than the dominant which allows the piece to smoothly transition back to the original key for the ending with a PAC.