1. Yes/No questions

2. The basic rule for asking questions in English is straightforward: Invert the order of the subject and the first auxiliary verb.
It is snowing. = Is it snowing?
He can speak German. = Can he speak German?
They have lived here a long time. = Have they lived here a long time?
She will arrive at ten o'clock. = Will she arrive at ten o'clock?
He was driving fast. = Was he driving fast?
You have been smoking. = Have you been smoking?

3. If there is no auxiliary, use part of the verb 'to do'.
You speak fluent French. = Do you speak fluent French?
She lives in Brussels. = Does she live in Brussels?
They lived in Manchester. = Did they live in Manchester?
He had an accident. = Did he have an accident?

4. Open questions.
Open questions are often called Wh.. questions: There are eight wh-questions - what, when, where, which, who, whom, whose and why and to this list we usually add how as they are all used to elicit particular kinds of information. You use what when you are asking for information about something. You use when to ask about the time that something happened or will happen. You use where to ask questions about place or position. You use which when you are asking for information about one of a limited number of things. You use who or whom when you are asking about someone's identity. You use whose to ask about possession. You use why to ask for a reason. You use how to ask about the way in which something is done.

5. Check yourself They do their homework at night. (when)
 Mr. Robertson came to the party alone. (who)
 The car is across the street from the house. (where) 
I like the red blouse, not the blue one. (which)
 She felt better after she took a nap. (how) 
That is an English book. (what) 
My sister called her boyfriend yesterday (when) 
She talked to him for an hour. (how long) 
He studies piano at the university. (what) 
The party lasted all night. (how long) 

6. The check was for $5.50. (how much) She was eating a sandwich. (what)
She is working hard. (what) 
My parents have two cars. (how many)
 They are coming to visit tomorrow. (when)
 He is going to work right now. (where)
 The man with the white hat is my brother. (who)
 I do not get up early because I like to sleep late. (why)
 We have an English class every day. (how often) 
They like to dance on weekends. (what)
 The club is not far from their house. (where)
 Their favorite kind of music is Latin Jazz. (what)
 I did not bring my dictionary today. (why)
 They are singing popular songs. (what kind)
The check was for $5.50. (how much)
She was eating a sandwich. (what) 

7. Extra material