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The conventions for changing from singular to plural endings.

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Word ending
Plural ending
Singular example
Plural example
ex, ix, yx   ices   index   indices  
🗑
is   es   progonosis   progonoses  
🗑
ma   mata   stigma   stigmata  
🗑
nx (anx, inx, ynx)   nges   phalanx   phalanges  
🗑
on   a   phenomenon   phenomena  
🗑
um   a   serum   sera  
🗑
us   i   thrombus   tthrombi  
🗑
a        
🗑
en   ina   lumen   lumina  
🗑


   

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