Do the rules of un and una change with vowels? See question?

Question

I know that un and una must agree in gender, but they also stand in for "a" and "an" (indefinite articles) in English. My question is, does either word change when it is used before a word that begins with a vowel? (For example: "Tom ate A fish, but Anna at AN apple). Does that work in Espanol?

Answer 1

Yes una changes to un when in front on an accented a sound. (Also la changes to el).

the masculine article un is also used before feminine nouns which begin with accented a
or ha e.g. un arma poderosa, un hambre feroz

Answer 2

The articles don't change if they're before a word that begins with a vowel, but 'y' (and) changes to 'e' if it comes before a word that begins with i,ll or y.

Answer 3

It is "a" when the word following starts with a "Consonant"

It is "an" when the word following starts with a "Vowel"

An exception is

"a unicorn" because the word "unicorn" has a "y" sound at the beginning.

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"una" is used if the word following is "feminine"

"uno" is used if the word following is "masculine"

"un" can be used on any word

Answer 4

Gender is the only concern here. Un peso, Una chica. Tenga UN buen dia.

Answer 5

it would be : tom comio un pescado , pero anna comio una mansana