Oops!, I realized the student hadn't asked me if I was going to that school (she didn't know me), she just wanted the teacher to keep asking the questions.
I offered this sentence:
Oops! I realized the student wasn't with me and she just asked the teacher if she was going to continue, speak up, while I thought she (is with me and) means if I was going to the Speak Up school! What an embarrassment!
The story is about misunderstanding of "are you going to speak up"
He said "to be with sb" means to understand someone but I think it could also means to adress someone to talk with them, right? If no, what is the proper phrase for that?