Questions answered with yes or no: Do you like coffee? Is she coming?
Auxiliary + subject + main verb? (Do you like...?)
Auxiliary + n't + subject + verb? (Don't you like...?)
Invert subject and auxiliary
💡 With 'be' as main verb, just invert: She is here → Is she here?
✓Do you like pizza?
✗You like pizza?
Need auxiliary 'do' at start.
✓Is she coming?
✗Does she is coming?
With 'be', just invert; don't add 'do'.
✓Have you finished?
✗You have finished?
Invert auxiliary and subject.