Auxiliary verbs in questions

When we make a question we almost always have to use an auxiliary verb. Look at the construction we use when we make a question:

Question word	Auxiliary	Subject	Verb
Where	do	you	live?
What time	does	he	start work ?
	Did	they	go on holiday last summer?
Where	would	you	like to go?
	Can	she	swim?
What	are	you	doing?
	Was	he	sleeping when you got home?
How long	have	you	been working here?
	Could	you	help me please?
	Shall	we	go?
When	are	you	going to call him?