Which exressions below is correct?
Which exressions below is correct?
pair 1
1.Even if we could go back and start a new life, history follows its former trace as usual. 2. If we could go back and start a new life, history wouldn't have changed.
pair 2
1, By the time I own enough money, you will have already gone away.
2. By the time I own enough money, you would have already gone away.