Questions in Semantics, I need your help!

[moonlightshadow]

Hello

I am self-studying Semantics from Semantics A Coursebook by James Hurford, Brendan Heasley and Micheal Smith. I find Semantics ,unlike the other sub fields, very difficult.

• I don't get opaque con,( if you have the book ,2nd ed, Please, open page 41 and tell me why in the practice the answers to number 4 and 7 is NO while I still think it's YES)
  
  Most importantly this is what I have problems with:
  What is the different between predicate and predicator, please give clear examples. This one is driving me crazy. I need someone to explain it to me in depth. You have no idea how many books and ebooks concerning Semantics I have read. Non of them except, Semantics A Coursebook is talking about predicator. I tried linguistics forums and I searched the net but there was nothing helpful
  
  Let it be clear that I am confused when it comes to the Semantic sense of predicate ,predicator.I am not confused with its grammatical sense
  

Any help -especially with predicate , predicator concept - would be most appreciated!

Thanks