Most teachers understand. Generally speaking, the more familiar you are with the teacher, the easier it is to talk. You can stay after class and ask one or two questions, or answer them actively. After a few times, the teacher will have an impression on you, at least to prove that you are an active learner, instead of coming to me and asking me why I should give it to you. This is unfair to others (in case you want to study abroad). When you want to score, you can score according to the school's grade point. For example, if you are over 90, you can tell the teacher that if I almost get 90, can you help me get 90? This kind of teacher will basically agree that it is basically no problem to mention a paragraph according to the score you can take and the corresponding grade point. But the difference depends on the relationship between you and the teacher, as well as the individual teacher. Some schools in the school will randomly check the teacher's marking and give points. If you ask too much, he will be in trouble. Generally speaking, the less important the courses (professional core courses and the like), the more accommodating the teachers (elective courses and the like). Finally, tell the teacher in person that I think it is more appropriate and generous. It's nothing. Just don't go to graduate school without conscience. If your classmates know that your character is gone.