I'm Asrar. I want to know the followings-

1. The Structure of Wh questions in details.
2. The Structure of Direct questions in details.
3.The Structure of Indirect questions in details.

I think a particular "Wh-" word(s) can be used for a particular verb. For instance:

# You live in NY.
Here NY is a place. So, i can use "WHERE" to ask question.

#Where do you live?

but in this case i can't use "WHAT","WHICH". But "WHY","HOW" can be used with any verbs.

I'm confused!Emotion: rolleyes
So, from the information above, am I right? Emotion: rolleyes

Please let me know
It’s not the “wh-word” that limits its use; it’s the meaning of what you want to say that restricts the use of such word.

You could always say, “what do you live?” or “which do you live?” but then your questions would not make any sense.

On the other hand, “why” and “how” questions always make sense.
Students: We have free audio pronunciation exercises.
Welcome to English Forums!

Your questions are of an extremely broad and general nature.
If you want to know all those structures in detail, you need to get a good grammar book.
If you have specific questions about just a sentence or two, then post your specific question and we'll be glad to help, but it would be inappropriate for us to post several chapters of material here to answer such big questions!

As for the more specific part of your post, you can form a what question or a which question to ask about a thing and a who question to ask about a person. Others have already responded to this part of your post.

Please do some searches at this site (top right Search box), say for:

direct questions
indirect questions

You'll find many pre-existing threads such as:

http://www.EnglishForward.com/search/Indirect questions .htm

You have to do some work too, not just usEmotion: smile
im so lost so what is a direct qoutation
Teachers: We supply a list of EFL job vacancies
im so lost so what is a direct qoutation

When you give a direct quotation, you are telling us the exact words that someone said or wrote.

Best wishes, Clive