1. Establish your own theme
First of all, you need a clear theme and an atmosphere you want to create. What you want to express through music is very important. Usually, the music you choose gives you a general vibe. You need to keep developing the theme in line with this atmosphere.
2. Determine the correspondence between words and sounds
How many sounds are associated with each word, and how to distribute each sentence in the music. If you do this well, you can It makes the filled-in music have a very clear sense of rhythm. If it is not good, the whole song will be messy -_-|| The main melody in music actually reminds you how to arrange it. If necessary, you can refer to other people's arrangements. For example, the pure music "Flowers, Snow and Moon" adapted from "Summer Love" is very nice.
3 Careful wording
The next step is the important, important, important part. Use your words to express feelings. You need to pay attention to the correlation between these sentences, and you need to pay attention to whether your sentences are easy to sing and whether they rhyme. If they rhyme, of course they will be catchy when sung and will sound classy. I was very desperate to fill in a word, and when I tried to sing it, my tongue was tied =_=. In terms of wording, I am used to using the same style throughout the song. Of course, whether you yearn for something fresh or more old-fashioned depends on your own preference.
4 Audition part
Audition can allow you to discover your shortcomings in writing lyrics, and also provide you with more opportunities to make corrections.