Is it possible to show the binding name in the echo area automatically?

[E'Chao Zhang]

I'm quite new here and I tried searching the archive. Please my question 
appeared before, please excuse me and point me to the answer.

I just experienced some unfortunate incident. Some mode overrode the M-. 
binding. I failed to notice the fact until very later - partly because 
I'm quite new in using emacs. I wonder if there is some variable to set 
and then emacs will automatically print the binding name before and 
while executing the command bound by the key strokes. I heard that emacs 
can suggest-key-bindings. If it can suggest binding names, I think it'd 
be more convenient to the new hands.

I'd appreciate any help. Thanks a lot.
E'Chao