De quoi and Ce dont and delaquelle difference?

when not asking a question, when does de quoi fit in for ce dont.





which one of these make sense TO SAY THAT'S WHAT I'M TALKING ABOUT?


C'EST DE QUOI JE PARLE


C'EST CE DONT JE PARLE


OR C'EST DE CA QUE JE PARLE





and if you wanted to say>>.Do you know what i'm talking about???<<


do you say


TU SAIS DE QUOI/CE DONT JE PARLE








AND WHEN DO YOU USE de laquelle and duquel?








in english when you mention someone's name, you can put THIS, THAT, and THE in front of it. Can you do that in french.





ex-Im not talking about THE George Washington with white hair.





in french, do you put LE or LA in front of names too, whe youre trying to specify something






Why not try posting this question on the french yahoo. You may get the answer you want. Just post it exactly as is. I did this and got a reply in English for a question I had about language. Also, I wouldn't put it in the dining out section.




same