Если бы вы помогли тогда, много лет

Если бы вы помогли тогда, много лет назад, вы бы его не узнали

Results (English) 1:

If you helped then, many years ago, you would not hear

Results (English) 2:

If you have helped all those years ago, you would not have learned

Results (English) 3:

if you helped so many years ago, you wouldn't know