Writing ideas and key points: Mainly appreciate the movement from the aspects of emotion, tonality and plot.

Text:

Beethoven's sonatas of this period were full of experimental approaches, and he attempted to re-evaluate the main creative principles of the sonata form. In the traditional format, the sonata form often only appears in one movement, usually in the first movement. However, Beethoven broke this pattern. The Piano Sonata No. 14 in C sharp minor is the work in which the classical music school begins to transform into the romantic music school. one.

The first movement is extremely rich in emotional expression, including meditative tenderness, sad chanting, and dark premonitions. Although the accompaniment, theme and intensity have not changed much, the fluctuations of the author's heartstrings are still delicately expressed through changes in harmony, register and rhythm. This sonata contains Beethoven's most original ideas.

Its dream-like improvisational nature and the way it explores the sound of piano sounds have predicted Debussy's Impressionism about a hundred years later. The theme it is based on is very simple: at the beginning of the music, boundless fantasy is constructed by the continuous flow of triplets. Four bars later, the first theme appears faintly in the alto area. It is delicate and calm, with a hint of melancholy.

The second theme appears in the key of B major at 1 minute and 18 seconds in section 1. The middle part begins with the first theme. The triplet twists and turns towards the high range, showing an irritable and restless mood. Then, entering the third paragraph, the first theme reappears calmly, the second theme reappears in the key of C-sharp minor, and then the bass continues to play the coda of the basic motive, slowly disappearing and ending.

The second movement is relatively short. Liszt described this movement as "a flower between two abyss". It perfectly connects the contemplation of the first movement with the tense atmosphere of the third movement with completely different light expressions. The first section is a theme echoed by legato and staccato, and then repeated with variations. The middle part also remains in D flat major. Section 2 reproduces the first section at 1 minute and 13 seconds. This movement seems to be a gentle smile left in an instant.