First of all, answer your question, not plagiarism, but being good at learning and quoting. Everyone's words can often express their meaning more accurately and deeply.
What teachers don't like is the overuse of templates. Compare the eight-part essays written by Sima Qian, Qu Yuan, Tao Yuanming, Li Bai, Su Shi, Lu Xun, Shi Tiesheng, Jobs, Zhang Ailing and Yu. They didn't copy it, let alone yours.
But you said that your composition rarely has your own comments, which is a big problem. Quotes or examples serve your point of view.
In addition, relying too much on other people's language will inhibit your expression and affect other disciplines. Of course, if you not only memorize, but also internalize understanding, that is another matter.
Think more and practice more. Composition should not only be liked by teachers, but also meet the requirements of society for expression, communication and speculation, and freely express their unique ideas.
Keep working hard and don't worry too much.
2. What kind of composition is plagiarism? Plagiarism, for example, has the same paragraphs as some candidates. If the marking teacher sees two identical examples with the same style (the big article quotes the same paragraph), it is plagiarism. The first batch of papers is a plagiarist, and the second batch is a plagiarist. No matter who finds this article or anything else first, you will think that the second person is a plagiarist. This is the rule in Dalian) or recite a writer's article in detail. (If the marking teacher has read it and found the article at the same time) Generally speaking, most marking teachers try to give points (middle school and college entrance examination), so as long as it is not too obvious, there should be no problem. It is important that you don't write "Lei Wentong" and try to avoid exchanging compositions with your classmates or reciting the same article before the exam. Generally, you should avoid suspicion. And most full marks should be avoided.
Generally speaking, the standard is to learn from other newspapers and magazines. It's not too long to limit things to one paragraph. In fact, it is best to learn from a few words or words to decorate your article. If you are a classmate, more than 20% of the words in the article can be defined as plagiarism, because everyone's vocabulary and writing habits are different. It has nothing to do with the structure of the article, because no matter whether it is argumentative or narrative, the structure is nothing more than that.
How to write a novel is plagiarism? I think the definition of plagiarism has become more and more outrageous recently, and I feel a little scared. If you just borrow a scene from a TV series and add your own ideas and descriptions, I don't think it is plagiarism. If you describe the plot of the TV series or words you have seen, it is plagiarism, because such words have no words you think of.
Then learn the sentences in other texts. This is really hard to say. One or two sentences should not count, but if you use or use some classic sentences in a long paragraph, you can copy them.
Actually, there is no need to be so nervous. If you really write carefully, readers will feel it and won't find fault with the places you quote. I have seen this sentence in which article.
Come on, write.