Possible Duplicate:
Is it OK to add a question mark to show inflection?
Sometimes, auxiliary verbs or helping verbs are not present in some interrogative sentences in some specific contexts where they actually appear to be (mostly in simple present tense). Some common examples:
Where you want to go?
What happened to him?
How an induction motor starts?
Where he lives?
What he means?
You know?
Why are these sentences not formulated something like the following? Is it just a shortcut way?
Where do you want to go?
What did happen to him?
How does an induction motor start?
Where does he live?
What does he mean?
Do you know?
