I could not pass the exam..

[wissmayes]

Hi all, I had an exam 3 dayes ago and I could not answered these questions:
what is the meaning of:
stress group,stress syllable, rhythm unit,tonic syllable?
I may knew the meaning of one or tow of them but I don't know the detailed aspect.
COULD YOU PLEASE HELP ME.
THANX ALOT.

[RonBee]

Say:

I had an exam three days ago and I could not answer these questions.

(Are you taking a course having to do with poetry?)

~R