In the following phrases, one is appropriate to address your teacher, the other one to address friends and family. Check the one you would use to address your teacher
Give me that book
Could you give me that book, please?
I need this book. Give it to me now!
Explain this exercise
Could you explain this exercise, please?
Explain this now. I don't understand
Repeat that
Say it again!
Could you repeat that, please?
Help me
Could you help me please?
Help me now
I don't understand
Sorry, I don't understand. Cold you explain again, please?