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Modulate up a Perfect 5th  |  
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V becomes I 
or 
Use a V/V which is a Major II  |  
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Modulate up a Perfect 4th  |  
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        Definition 
        
          
  
  
IV becomes I 
  
continue to tonicize new key with ii6/5 V7 I prog.  |  
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ii becomes i 
continue to tonicize new key with ii6/5 V7 i or I prog.  |  
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vi becomes i 
follow with a ii6/5 i6/4 V7 i  
or use the V7 to tonicize a major chord instead.  |  
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vi becomes iv 
iv belongs to a minor chord set, follow with a V7 to either i or I.  |  
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VI becomes I 
The VI chord is borrowed from the minor version of the original key. 
  
follow with a vi IV V I progression.  |  
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IV7 becomes V7 
follow with a ii6 I6/4 V7 I progression 
     
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Go to the IV then to a IV7/IV which becomes the V7chord of the new key. 
  
(C F Bb7 Eb)  |  
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use vi to the V7 in the new key. 
  
(the V7 would be a German Sixth Chord) 
I vi --> V7 I ii6 I6/4 V I 
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vii dim.6  I6 to V in new key  
(I6 is a Neapolitan) 
(I  viidim6  I6 ----> V4/2  I6  ii6/5  V7  I)  |  
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Modulate up an Augmented 4th  |  
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        Definition 
        
          
  
  
use a viidim7.   
  
The SAME EXACT NOTES ARE USED in the viidim7 
of the key an Aug 4th up, only the chord will appear to be in second inversion.   
(I viidim7 ---> I  ii6/5  I6/4  V7  I)  |  
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