As the case may be, first of all, if the teacher is more responsible, he will mark it or write detailed amendments. If he just tells you that there are many problems in the paper, it doesn't mean that he is responsible, but an irresponsible performance. Many teachers will mark it in detail. If there is a problem, he will explain it and just modify it according to the teacher's meaning. I am most afraid of teachers. I don't say anything, just say there are many problems. You want to change it. I don't know where to start. If I don't change, I can't graduate. It is suggested to speak well of the teacher, and be sure to ask clearly where there are any problems, otherwise there is no way to start.