Just buy the scores and come back and analyze them yourself, then show them to your teacher. If you're already good at writing, you don't need to learn analysis specifically again. Analysis is generally much easier than writing, so if you look at it carefully, you'll be fine. The test is just written analysis, so if you can read music and see the tonality, you'll be fine, after that it's just a matter of looking at the tones contained in each chord. A real piece of work has a lot of extra chordal tones, and it takes experience to determine that. The bass of a chord is the backbone of the chord, so the bass often allows you to determine the nature of the chord in general, whether it is partial, subordinate or dominant, and whether the harmonic progression is regular, so that you can find out which are the chord voicings and which are the outtones. Chord voicings are often resolved to chord tones, and you'll get very good at it if you look at it a lot. If there is an altered chord, it may be overdubbed or out of tune, in which case you just have to look at the resolved chord to find out which key it is in. You can also look at the nature of the chords with the voiced chord, the major seventh chord is the dominant seventh, the minor seventh chord is the dominant seventh, and you can quickly determine the direction of the out-of-tune chord. If you find a chord with a fourth or a sixth, sometimes it may be a terminating chord, perhaps out of tune, perhaps transposed. If there is transposition, which means the phrase or section ends on a terminating form in another key, then find the intermediary chord by plugging both ends.

I recommend that you analyze the score columns more: for example, "Harmonic Analysis Score Collection - Instrumental" and "Harmonic Analysis Score Collection - Vocal" which are books by Liu Jinxuan, and both of them are complete compositions. There is the Soviet textbook "harmonic analysis exercises" Skelepkov wrote, with Sposobin "harmonic tutorial" supporting, chapter arrangement is basically the same, some of which is Sposobin book exercises.

Also analyze Mendelssohn's "Songs Without Words", it is best to analyze all of them, the harmony of this work is written in a classic. Also analyze Beethoven's 32 sonatas. If you go deeper, you can analyze late Romantic vocal works, such as the art songs of Richard Strauss. How much you learn depends specifically on the requirements of the school and program you are taking.

Original by Ash.