There are two main types of questions: Yes/No questions and WH- questions. WH-questions are questions starting with Wh-words including: what, when, where, who, whom, which, whose, why, and how.

USES OF WH-WORDS

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To ask questions Wh-words are used at the beginning of a sentence and the Subject in such a sentence usually takes an Auxiliary Verb.

Wh-words “Who’, ‘What’, ‘Which’ (do not take any helping verb when they are used as the subject of the sentence. But if ‘Who’ is used in Negative form to replace everybody or everyone, they require to do as the helping verb.

• The answer portion in the statement must be left out.
• Wh-word must be placed in the first place.
• The following rules of the Interrogative pattern must be maintained.

Question words are used to ask about specific qualities, times, places, people, and so on. Below is a list of question words and example sentences:

Question words	Usages	Examples
What	Used to ask about things	– What are you doing? – What do you think about the movie?
when used	Used to ask about time	– When will the meeting start?  – When are you leaving?
Where	Used to ask about places	– Where’s my bag? – Where do you live?
Who	Used to ask about people	– Who do you love the most in your family? – Who told you that story?
who used	Used to ask about people (object of the verb)	– Whom did you see in the morning?  I saw Mr. Mark, my English teacher. – Whom was Jim talking to? He was talking to Jack, his new roommate.

Which	Used to ask about choices	– Which one do you choose? The left or right? – Of all the drinks in the menu, which one would you like?
Whose	Used to ask about possession	– Whose pencil is this? Is it yours? – Whose books are these?
Why	Used to ask about reasons/ causes	– Why did it happen? I didn’t understand. – Why is he crying?
How	Used to ask about manner/ process	– How can you explain this problem? Please tell us. – How can you get here?

                         I. How to form WH questions?

1. with an auxiliary