Question mark.

Question Mark

The main function of a question mark is to indicate a question or query.

1. Use a question mark at the end of all direct questions:

What is your name?
How much money did you transfer?
Did you send euro or dollars?

2. Use a question mark after a tag question:

You're French, aren't you?
Snow isn't green, is it?
He should go and see a doctor, shouldn't he?

3. Don't forget to use a question mark at the end of a sentence that really is a direct question:

How else would I get there, after all?
What if I said to you, "I don't love you any more"?
"Who knows when I'll die?", he asked rhetorically.

4. In very informal writing (personal letter or email), people sometimes use a question mark to turn a statement into a question:

See you at 9pm?
In the same situation, they may use two or three question marks together to show that they are not sure about something:

I think you said it would cost $10???

5. Do not use a question mark after an indirect or reported question:

The teacher asked them what their names were. (What are your names?)
John asked Mary if she loved him. (Do you love me?)
I'm wondering if she's coming. (Is she coming?)

6. Many polite requests or instructions are made in the form of a question. But because they are not really questions, they do not take a question mark:

Could you please send me your catalogue.
Would all first-class and business-class passengers now start boarding.

7. Be careful with titles and abbreviations when question marks are involved:

"Who's afraid of Virginia Woolf?" was a play before it was a film.
Who's afraid of Virginia Woolf? was a play before it was a film.
Have you seen the film "Who's afraid of Virginia Woolf?"?
Have you seen the film Who's afraid of Virginia Woolf??
Have you ever been to L.A.?

Note that there should be no space immediately before a question mark.