Okay, so you're sitting in a restaurant and you want to ask your waiter for a croque-monsieur (it's like a grilled cheese with ham). Except that you can't because you don't know how to ask questions in French.
At least you didn't, until now.
Est-ce que. Learn this phrase. Right now. It sounds like ess-kuh when you say it.
Est-ce que je peux avoir un croque-monsieur ? Où est-ce que j'ai mis mes clés ? Qu'est-ce que vous avez dit ?*
Est-ce que means, literally, is it that...
If we were translating it we would replace it with the words do/does/did...
*Can I have a croque-monsieur? Where did I put my keys? What did you say?
(Literally: Is it that I can have a croque-monsieur? Where is it that I put my keys? What is it that you said?)
Next lesson I'll hook you up with more question-words.