Question words in English

The table below shows a list of words which are used in questions in English. There are also contracted and full forms used in questions along with some examples of questions.

Question words	Contracted forms	Full forms	Examples
Who	Who's ...?	Who is ...? Who has ...?	Who's that man? Who's done it?
	Who'd ...?	Who had ...? Who would ...?	Who'd gone there? Who'd do it?
	Who'll ...?	Who will ...?	Who'll do it?
What	What's ...?	What is ...? What has ...?	What is it? What has happened?
	What've ...?	What have ...?	What have you done?
	What'll ...?	What will ...?	What will happen?
When	When's ...?	When is ...? When has ...?	When's the concert? When has it happened?
	When'll ...?	When will ...?	When will it happen?
Which	Which've ...?	Which have ...?	Which have you chosen?
	Which'll ...?	Which will ...?	Which one will be good?
Why	Why's ...?	Why is ...? Why has ...?	Why is it here? Why has he done it?
	Why'd ...?	Why had ...?	Why would you do it?
	Why'll ...?	Why will ...?	Why will he come?
Where	Where's ...?	Where is ...? Where has ...?	Where is it? Where has he gone?
	Where've ...?	Where have ...?	Where have you been?
	Where'll ...?	Where will ...?	Where will he go?
	Where'd ...?	Where would ...? Where had ...?	Where would he go? Where had he gone?
How	How's ...?	How is ...? How has ...?	How is your niece? How has it happened?
	How'd ...?	How had ...? How would ...?	How had it happened? How would it happen?
	How'll ...?	How will ...?	How will he arrive?