In a yes/no question in which the verb is negative, usually a contraction is used:

–Doesn't she live with you?

The other form, which is not contracted, is considered formal and is rarely used in everyday speech:

–Does she not live with you?

To form a negative question, make the auxiliary negative by adding not:

–Do they cash traveler's checks?
–> Don't they (Do they not) cash...?

HERE ARE SOME MORE EXAMPLES:

–Is Mr. Jones here?
–>Isn't Mr. Jones here?

–Are you coming?
–>Aren't you coming?

Examples of Negative Questions

• Aren't they married?
• Don't you have any cash?