In English, the main role of an article is to help people determine the kind of noun, i.e., whether it is a specific noun or not (using a definite article'the') is also a generic noun (using an indefinite article'a'or'an'）。And about the use'a'Still'an'As an article, it is mainly decided according to whether the following noun starts with a vowel phoneme or a consonant phoneme.
For words'european', which begins with a consonant phoneme, though'e'In the alphabet is a vowel letter, but here,'european'The pronunciation begins with the consonant phoneme. Therefore, when we need to use an indefinite article, we should choose it'a'It's not'an'。
So, the correct expression should be:'a european'It's not'an european'。The same rule applies to other singular nouns that begin with a consonant phoneme.
In summary, choose'a'Still'an'As an article, it should be determined based on the pronunciation of the noun rather than the way it is written. Use if the pronunciation of the noun starts with a vowel phoneme'an'；Use if starting with a consonant phoneme'a'。For'european'This word, since its pronunciation begins with a consonant phoneme, it should be used'a'as an article.
Materials** on the Internet.