Choose the correct form.
1. If I go/went/had gone to Leipzig, I'll visit the zoo.
2. If it doesn't rain/didn't rain/hadn't rained, we'd be in the garden.
3. If you wear/wore/had been wearing a lighter jacket,the car driver will see you earlier.
4. We will watch/would watch/would have watched TV tonight if Peter hadn't bought the theatre tickets.
5. If I were a millionaire, I will live/would live/would have lived in Beverly Hills.
6. You would save energy if you switch off/switched off/has switched off the lights more often.
7. If we read the book, we will understand/would understand/would have understood the film