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Model Verb corregir

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Changes: e i  -  go jo  -  ga ja  -  gá já

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Model Verb dirigir

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Changes: go jo  -  ga ja  -  gá já

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Model Verb dormir

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Changes: o ue  -  o u

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Model Verb escribir

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Gerund: escrito

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Model Verb huir

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Changes: + y

There are no accents on huis and hui. Please note that these conjugations used to have accents and were written as follows: huís, and huí. The RAE (Real Academia Española) decided that these words are now considered as having only one syllable instead of two and therefore no longer have accents. You can read about this at this link.