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Old September 26, 2018, 09:40 AM
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Rusty Rusty is offline
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Join Date: Aug 2007
Location: USA
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Native Language: American English
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Before a masculine noun, use veintiún. Uno is always shortened to un before a masculine noun. This shortened form is called an apocope.
un zapato
veintiún zapatos


Use veintiuno when you're counting, or when no noun is being quantified, just the same as using uno for counting or when there's no noun to modify.
uno, dos, ..., veintiuno, veintidós, etc.
Hoy es el veintiuno. (Today is the twenty-first.)

Use veintiuna before a feminine noun, just as you would say una before a feminine noun. (The apocope is used instead if the feminine word begins with a stressed 'a' sound.)
una corbata
veintiuna corbatas


un águila
veintiún águilas
un hacha
veintiún hachas

Last edited by Rusty; September 26, 2018 at 09:55 AM. Reason: augmented
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