How should this expression be used, and what is its origin?
It's certainly poor style, if not actually wrong, to join independent clauses with a comma when a semicolon or other punctuation would have sufficed. But interjections are usually offset from other ...
I know et voilà is a French interjection and means there it is. It is very much used in the US. Why is the use of et voilà so popular in the US? Which historical fact has made it so popular?
I'm a non-native English speaker and sometimes it's hard for me to pick up the right word in some situations. Could you, please, explain when it's better to use "goodbye" for ending a conversation, ...