When we report questions, there is no inversion of the subject and auxiliary in the reported clause (the word order is the same as in statements) and we do not use a question mark.
REPORTING CLAUSE + IF/WHETHER-CLAUSE (WITH NO INVERSION)
When reporting a yes/no question, we use if or whether:
Alex: Have you booked tickets for the concert?
Alex was wondering if/whether I had booked tickets for the concert.
Cynthia: Is there a wireless network available in the library?Cynthia inquired if/whether there was a wireless network avaliable in the library.
Peter: Is it cold outside?
Peter wants to know if/whether it is cold outside or not.
Peter wants to know whether or not it is cold outside.
REPORTING CLAUSE + WH-CLAUSE (WITH NO INVERSION)
When we report a wh-question, we repeat the original question word (who, what, when, where, how etc.) in the reported clause:
Katie: Where do you live?
Katie asked me where I lived.
Tim: Who are you waiting for?Tim wanted to know who I was waiting for.
A wh-clause can be used to report exclamations:
John: How funny!
John exclaimed how funny it was.
Examples of reporting verbs used to report questions:
|reporting verbs used in indirect questions|
want to know
We can use an indirect question after other reporting verbs when we are not reporting a question but we are talking about the answer to a question:
I've told you before why I don't like shopping malls.
She didn't say what time she would be back.
When we want to make a question more polite, we often introduce the sentence with expressions such as Could you tell me...?, Do you know...? etc. and continue with an indirect question:
Could you tell me how I can get to the railway station?
Do you know if this shop sells second hand records?
Can you remember what time the play starts?
Source / Kaynak: grammaring.com