Don't worry too much, the knowledge of junior middle school has little to do with primary school. I didn't do well in junior high school either, but I had a solid foundation, although my primary school grades were not outstanding. Every time I fail in the exam, I reflect on myself and sum up my experience. After entering junior high school, my grades rose from the middle of my class to the top, and once I exceeded my normal performance, I actually got the first place in the whole grade. Believe in yourself, and you can do it. Don't be too sad. Study hard in junior high school, you will succeed, and repay your parents' love with your grades. Keep trying! !