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