You can't understand what someone has said.	I'm sorry, but I don't understand.
Someone is speaking too softly (too quietly).	Could you speak a little louder, please?
You don't know what page the class is on.	What page are we on?
You would like the professor to write something on the board.	Would you write that on the board, please?
You don't know how to spell a word.	How do you spell that word?
You think it's your turn but you're not sure.	Is it my turn?
You don't know how to pronounce a word.	How do you pronounce that /this?
You don't know what _____________ means.	What does ________________ mean?
You would like to ask a question.	May I ask a question?
You would like someone to speak a little more slowly.	Could you (Would you) please speak a little more slowly?
You would like someone to repeat something.	Would you (or Could you) please repeat that?