Unreal conditionals (type II + III) sometimes can be mixed, that is, the time of the if clause is different from the one of the main clause. пустоPast → Present If I had taken an aspirin, I wouldn't have a headache now. пустоFuture → Past If I had known that you are going to come by tomorrow, I would be in then. пустоPast → Future If she had enough money, she could have done this trip to Hawaii. пустоFuture → Present If I were you, I would be spending my vacation in Seattle. пустоPresent → Future If I weren't flying to Detroit, I would have planned a trip to Vancouver. пустоPresent → Past If I were taking this exam next week, I would be high-strung.