I'm glad to answer it for you. First of all, there are no rules in high school. You can write a narrative or an argumentative essay, whatever you are good at.
Excerpting sentences is something that high school students like to do. Don't take excerpts as utilitarian things. In fact, the biggest role of abstraction should be to improve one's literary accomplishment. I extracted two books in high school, both of which are very poetic, and I enjoyed reading them.
As for whether what you said is useful, to be honest, the college entrance examination compositions in recent years are biased towards social reality, or topic discussion. Most people mainly discuss in meetings, but there are also many excellent narratives. These sentences should be rarely used in college entrance examination composition, but their knowledge is comprehensive. Maybe inspiration comes suddenly when writing a composition, and the emergence of inspiration often lies in the usual accumulation.
Mainly argumentative essays. You should use narratives to express your true feelings. I don't think it's as good as argumentation. . . . It must be useful. You can use argumentative writing and narrative writing. You can't just use some simple sentences.
High school composition is mainly topic composition, and the subject matter is generally not limited. You can play freely. It tests your knowledge accumulation and thinking ability, but it is also easy to be tricky. Personally, I think it's simpler and less rigid.
The accumulation of sentences is the key to writing at any time, so it is definitely useful. The key is to see how you use it. For example, if you say you like poetic sentences, don't write that kind of argument when you write a composition. You can try to write a composition similar to prose and be lyrical, so that the sentences you have accumulated will be useful. Also, the most important thing in writing a composition is that your emotional tone and thoughts should be positive.
Unless you have a strong writing skill, narration is not recommended. I don't know if your purpose is to cope with the college entrance examination or something. If it is to cope with the college entrance examination, it is very simple. General argumentative essays are templates. The first paragraph comes straight to the point and writes the argument. The second paragraph is written by imitating people or things with the parallelism sentences recited by yourself to enhance the impression of the marking teacher. Then analyze your argument in 200__300 words. Then use two or three paragraphs to prove the argument. Suggest using examples and quotations. The last paragraph uses dozens of words to manage the beginning and end. Sure, whatever you need. The more sentences you accumulate, the easier it is to write. It is suggested to know more about ancient poems, celebrity stories, aspirations and historical stories. Anything will do. This is a general template. I used it in high school for three years, which is quite good. This template provides a platform for you to recite sentences. I hope it helps you.