We use question words to ask certain types of questions (question word questions). We often refer to them as WH words because they include the letters WH (for example WHy, HoW).
|what||asking for information about something||What is your name?|
|asking for repetition or confirmation||What? I can't hear you.|
You did what?
|what...for||asking for a reason, asking why||What did you do that for?|
|when||asking about time||When did he leave?|
|where||asking in or at what place or position||Where do they live?|
|which||asking about choice||Which colour do you want?|
|who||asking what or which person or people (subject)||Who opened the door?|
|whom||asking what or which person or people (object)||Whom did you see?|
|whose||asking about ownership||Whose are these keys?|
Whose turn is it?
|why||asking for reason, asking what...for||Why do you say that?|
|why don't||making a suggestion||Why don't I help you?|
|how||asking about manner||How does this work?|
|asking about condition or quality||How was your exam?|
|how + adj/adv||asking about extent or degree||see examples below|
|how far||distance||How far is Pattaya from Bangkok?|
|how long||length (time or space)||How long will it take?|
|how many||quantity (countable)||How many cars are there?|
|how much||quantity (uncountable)||How much money do you have?|
|how old||age||How old are you?|
|how come (informal)||asking for reason, asking why||How come I can't see her?|