When writing fragments of descriptions of demeanor, movement, appearance and language, you can start from the following aspects.

1. Observe details: Carefully observe the characters’ appearance characteristics, such as body shape, facial features, posture, etc. Pay attention to details such as the characters' clothing, hairstyle, and decorations, as well as their expressions and eyes.

2. Express emotions: Show the characters’ emotional state at the moment by describing their expressions and movements. You can use adjectives and adverbs to describe characters' expressions, actions, and language, such as anxiety, helplessness, confidence, calmness, etc.

3. Create atmosphere: Use appropriate description techniques to create the atmosphere of the scene. By describing the surrounding environment, atmosphere, sounds and other details, readers can enhance the reader's perception of the scene and the emotions of the characters.

4. Use metaphors and metaphors: Using metaphors and metaphors can express the character's state and emotions more vividly. For example, "sweat beads rolling down like pearls" is used to describe nervous emotions, or "eyes are as sharp as swords" is used to describe firm gaze.

5. Necessary dialogue: Appropriate introduction of the characters’ language can better show their emotions and psychological state. Through dialogue, readers can gain a deeper understanding of the characters' inner world.

Using the above techniques comprehensively, you can better describe the characters' demeanor, movements, appearance and language, so that readers can more truly feel the changes in the characters' emotions and the atmosphere of the scene. Three sample essays are shared below

Essay 1: Description of expressions and movements

She slumped down on the chair, her hands clasped tightly in front of her chest, and her brows furrowed slightly. Her face was pale, and there were beads of sweat on her forehead, which she wiped away gently with a handkerchief from time to time. Her eyes narrowed into slits and she stared forward, revealing deep anxiety and helplessness in her eyes.

Suddenly, her body trembled and she stood up suddenly. Her hands were clenched into fists, her trembling knuckles revealing her inner tension. She stepped forward and walked towards the corner of the room, as if looking for something. Suddenly, she paused and pointed a trembling finger at a piece of paper on the floor. It was a heartbreaking letter.

Essay 2: Description of appearance and language fragments

His tall stature seems a bit clumsy, but he exudes confidence and calmness. His broad shoulders gave him a solid look, and he wore a neat black suit with his tie tied neatly to his shirt. His face is handsome, and his masculinity reveals his perseverance and courage.

Those eyes are even more charming, and their deep gaze reveals his inner wisdom and determination. The wrinkled brows seemed to be thinking about something important, and the corners of the mouth were slightly raised with a confident smile. His high nose and strong chin outline his perseverance.

Composition 3: Description of language fragments

She lowered her head and bit her lip gently, her expression hesitant and worried. Her eyes were blinking as she seemed to be trying to clear her thoughts. Her slender fingers inadvertently tugged at the hem of her clothes, her movements revealing her inner anxiety.

Suddenly, she raised her head and stared firmly ahead. She straightened her body and stood up straighter, and her slightly trembling shoulders gradually calmed down. She took a deep breath, a firm light flashed in her eyes, and told herself to face it bravely. She took firm steps towards her goal.