Полное правило? Хм...
Pr. Simple:noun+verb(inf) / noun+don't/doesn't+verb(inf) / Do/Does+noun+verb(inf)?
пример: I live in Moscow. I don't wake up at 7 o'clock. Do you eat pizza?
Pr. Continuous: noun+am/is/are+verb(+ing) / noun+am not/isn't/aren't+verb(+ing) / Am/Is/Are+noun+verb(+ing)
пример: I am sitting in town hall. He isn't studying right now. Are you lying on my bed?