Alexander Koryagin:   
      
   AK>> Do you think it would be more logical if we use them   
   AK>> vice versa? ;=)   
      
   AK> Hey, Ardith! ;-) After "if" I used a simple future time   
   AK> -- why not? I don't want to use the subjunctive mood in   
   AK> both clauses.   
      
   Start with the standard simple classification of   
   conditionals into three categories:   
      
       I.   He will find me if he knows how.   
      II.   He would find me if he knew how.   
     III.   He would have found me if he had known how.   
      
   Then learn the various "mixed" forms.  You can't mix them in   
   whatsoever way it likes you, but must follow the logic of   
   the tenses.  I highly recommend Baskerville and Sewell's   
   short and clear explanation:   
      
     http://www.gutenberg.org/files/14006/14006-h/14006-h.htm#Page_139   
      
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