[WH Questions Conversation Performance] Have you....

A : Did you understand about the material last meeting?

B : I'm not sure, but I understand a little bit. By the way, how's your math assignment?

A : Have you finished it?

B : No, I haven't.

A : What if we ask to C?

B : Have you done your math assignment?

C : Of course?

A : Did you bring your note?

C : No, I didn't bring it.

B : Would you like to teach us tonight?

C : Sorry, I can't. I'm going gethering with my big family. How about tomorrow?

B : Okey ^^