1. do ... go: Present Simple (Indefinite), to go.2. sleeps: Present Simple (Indefinite), to sleep; slept: Past Simple (Indefinite), to sleep.3. did write: Past Simple (Indefinite), to write.4. flows: Present Simple (Indefinite), to flow.5. shall go: Future Simple (Indefinite), to go; will come: Future Simple (Indefinite), to come.6. Look: Present Simple (Indefinite), to look; is snowing: Present Continuous (Progressive), to snow.7. were doing: Past Continuous (progressive), to do; were having: Past Continuous (Progressive), to have.8. don't come: Present Simple (Indefinite), to come; shall be writing: Future Continuous (Progressive), to write.9. came: Past Simple (Indefinite), to come; were sitting: Past Continuous (Progressive), to sit; were watching: Past Continuous (Progressive), to watch.