Yes/no questions and information questions

 A yes/no question = a question that can be answered by “yes” or “no”
A: Does Ann live in Montreal?
B: Yes, she does.  Or she doesn’t
An information question = a question that ask for information by using a question word: where, when, why, who, whom, what, which, whose, how. 
A: Where does Ann live?
B: In Montreal?

(Question Word)	Helping Verb	Subject	Main verb	(Rest Of Sentence)	The subject-verb word order is used in both yes/no and information questions. Helping Verb + Subject + Main Verb. (a) is a yes/no question (b) is an information question
(a)	Does	Ann	Live	In Montreal?
(b) where	Does	Ann	Live?
(c)	Is	Sara	Studying	At the library?
(d) where	Is	Sara	Studying?
(e)	Will	You	Graduate	Next year?	In (i) and (j): main verb be in simple present and simple past (Am. Is. Are, was, were)precedes the subject. It has the same position as a helping verb.
(f) when	Will	You	Graduate?
(g)	Did	They	See	Jack?
(h) when	Did	They	See?
(i)	Is	Heidi
(j) where	Is	Heidi
(k)		who	Came	To dinner?	When the question word (e.g., who or what) is the subject of the question, usual question word order is not used. No form of do is used. Notice (k)and (l).
(l)		what	happened	Yesterday?