How to ask for leave from the teacher in WeChat?

1, "Hello, teacher, I need to take a few days off because I have to attend important family activities. I have arranged a study plan to ensure that I can keep up with the progress of the course when I come back. Thank you for your understanding and help. "

2. "Hello, teacher, because I need to take an important exam, and I hope I can take a day off. After the exam, I will contact you as soon as possible to find out the content of the class. Thank you for your support and understanding. "

3. "Hello, teacher, I'm XX. I'm sorry to bother you. I may need to take a day off because I suddenly feel uncomfortable. I will recover as soon as possible and make up the content in class. Thank you for your understanding. "