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4 Some adjectives end in -a , like the following: 

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These adjectives have three forms: -a  for the masculine and feminine singular ( ottimist a ), -i  for the masculine plural ( ottimist i ) and -e  for the feminine plural ( ottimist e ). There is thus only one form for the masculine and feminine singular: 

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* For an explanation of the -h-  in belghe , see paragraph 6 below. 

5 There are also some invariable adjectives, e.g. blu  (dark blue), rosa  (pink), dispari  (odd), pari  (even), which do not change. 

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6 Care is needed in spelling the plural of adjectives ending in -co  and -go . There is no fi xed rule for the masculine forms, which may keep the hard 

