question

Yes / No questions (closed questions)

In English, there are two basic types of questions: Yes / No questions and Wh- questions. Yes / No questions are also called closed questions because there are only two possible responses: Yes or No. When forming a Yes / No question, it must include one of these verbs: BE, DO, HAVE, or a modal verb. It is impossible to ask a Yes / No question without one of these verbs.

correct		incorrect
Are elections next year?		Elections next year?
Does he want to stay?		He want to stay?
Have the boys eaten?		The boys eaten?
Can the dog swim?		The dog swim?

Use the verb BE to ask Yes / No questions about the identity or description of a person, place, or thing.

question		response
Am I your friend?		Yes. / Yes, you are. / Yes, you are my friend.
Is this a good restaurant?		No. / No, it is not. / No, it is not a good restaurant.
Are these islands Greek?		Yes. / Yes, they are. / Yes, these islands are Greek.
Was his idea interesting?		No. / No, it wasn’t. / No, his idea was not interesting.
Were they happy?		Yes. / Yes, they were. / Yes, they were happy.

Note that the response can be short (Yes. / No.), or long: Yes or No followed by the subject and verb.

Use the verb BE with a preposition to ask Yes / No questions about a present or past location.

question		response
Am I at the correct location?		No. / No, you aren’t.
Are the keys under the books?		No. / No, they are not.
Was his house on an island?		Yes. / Yes, it was.
Were the demonstrations in the center of town?		No. / No, they weren’t.

Use the verb BE to ask a Yes / No question about a current activity or situation. This requires the present progressive: BE + (verb+ing).

question		response
Am I going with you and Tom?		Yes. / Yes, you are.
Is she working today?		No. / No, she isn’t.
Are we seeing a play tomorrow?		Yes. / Yes, we are.

Use the verb BE to ask a Yes / No question about a past activity or situation. This requires the past progressive: WAS / WERE + (verb+ing).

question		response
Was it raining?		Yes. / Yes, it was.
Were they playing?		No. / No, they weren’t.

Use the verb BE to ask a Yes / No question with the passive voice.

question		response
Is gold mined in Canada?		Yes. / Yes it is.
Are flowers grown here?		No. / No, they are not.
Was the book read?		Yes. / Yes, it was.

Use the verb HAVE to ask if somebody has done something or if some action has taken place. Note that these Yes / No questions use the present perfect (HAVE + past participle).

question		response
Has your brother left?		No. / No, he hasn’t.
Have you driven before?		Yes. / Yes, I have.
Has the party started?		Yes. / Yes, it has.

Use the verb DO to ask Yes / No questions in order to obtain facts about people, places, or things.

question		response
Do they smoke?		No. / No, they don’t.
Does it rain here?		Yes. / Yes, it does.
Did the key work?		No. / No, it didn’t.

Use modal verbs to ask Yes / No questions about possibilities or uncertainties.

question		response
Can we stay?		Yes. / Yes, we can. / Yes, we can stay.
Could this be true?		Yes. / Yes, it could (be true).
Should they stop?		No. / No, they shouldn’t (stop).
May I help you?		Yes. / Yes you may (help me).

Remember: When asking Yes / No questions with DO or a modal verb, the main verb remains in the base form (without to).

correct		incorrect
Do you drink coffee?		Do you to drink coffee?
Does she work here?		Does she to work here?
Can I go with you?		Can I to go with you?
Should we email her?		Should we to email her?

However, if there are two verbs that follow DO, the second verb remains in the infinitive (with to).

correct		incorrect
Do you want to drink coffee?		Do you want drink coffee?
Does she like to work here?		Does she like work here?
Did you need to go home?		Did you need go home?

Note that there are several ways to answer Yes / No questions, especially when using contractions.

question	response
Is he busy?	No.
	No, he isn’t.
	No, he’s not.
	No, he is not.
	No, he isn’t busy.
	No, he’s not busy.
	No, he is not busy.

http://www.elearnenglishlanguage.com/blog/learn-english/grammar/questions-yes-no/

Question Tags

We use tags in spoken English but not in formal written English.

They are not really questions but are a way of asking the other person to make a comment and so keep the conversation open.

Making a tag is very mechanical. To make a tag, use the first auxiliary. If there is no auxiliary, use do, does or did. With a positive sentence, make a negative tag and with a negative sentence, make a positive tag.

• It's beautiful, isn't it?
• He has been, hasn't he?
• You can, can't you?
• It must be, mustn't it?
• You know him, don’t you?
• He finished it, didn't he?
• He will come, won't he?

• It isn't very good, is it?
• It hasn't rained, has it?
• It can't be, can it?
• Jenny doesn't know James, does she?
• They didn't leave, did they?
• He won’t do it, will he?

Notice these:

• There isn't an ATM here, is there?
• Let's have a cup of coffee, shall we?

To reply, use the same auxiliary:

• It's beautiful, isn't it? ~ Yes, it is. I think it's fabulous.
• It isn't very good, is it? ~ No, it isn't. In fact, it's terrible.

Although, the rules are very simple and mechanical, in order to use them easily in conversation, they have to be automatic. So you need to hear and practice them very often.

 http://www.englishgrammarsecrets.com/questionstags/menu.php

WH Question Words

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).

question word	function	example sentence
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?

https://www.englishclub.com/vocabulary/wh-question-words.htm