Both are correct but it depends on the context. This is a very fine thread." means the thread is not wide. "This is a very fine day" means it is a nice day ( the weather is good) but it sounds old-fashioned to me. "I speak English very well" "I don't feel very well" meaning I am sick" very well can mean "yes, okey" in some places. a: Why doesn't anybody ever clean the oven? b: Very well, I'll do it

Very well.