The day after tomorrow is my birthday, but a classmate I invited and I are going to sing a chorus. How to ask the teacher for leave?

Hehe, you should think that everyone sang together to celebrate your birthday that day. Birthdays happen every year, so relax. Actually, it's okay not to ask for leave. Happy birthday to you in advance, classmate!

Or:

1. If you don't participate in school activities, just tell the teacher that you have asked for leave;

2. Ask for leave from the teacher in advance or later on the birthday;

3. Ask your classmates to wait for you, and then ask the teacher for leave after singing;

Hehe, just say you just need her to accompany you. It's not good for children to lie when there are things at home. Ha ha.