Articles theory in Hebrew grammar is an important aspect that deals with the usage and function of articles in the Hebrew language. Hebrew has both definite and indefinite articles, which serve to specify or generalize a noun.

The definite article in Hebrew is “הַ” (ha), which is used before a noun to indicate a specific or known object. It serves a similar function to the English “the”. For example, “הַיֶּלֶד” (hayeled) means “the boy”.

The indefinite article in Hebrew is “אֶחָד” (echad), which means “one” or “a”. It is used before a noun to indicate a non-specific or unknown object. This corresponds to the English “a” or “an”. For example, “אִישׁ אֶחָד” (ish echad) means “a man”.

The usage of articles in Hebrew can be complex, as they can change depending on the gender, number, and case of the noun. It is important to understand and master these rules in order to use articles correctly in Hebrew grammar.