Question

Mi padre es plomero y mi madre es _________ profesora famosa.

Which definite or indefinite article should I use if any.

Answer 1

The answer is una ….mi madre es una profesora famosa

Answer 2

Mi padre es plomero y mi madre es una profesora famosa.

You must use an indefinite article (feminine and singular to agree with the accompanying noun) is "una".

The article is undefined because it is not an exact famous teacher.

MissSpanish