On: English: A vs. An

[bluebarbet]

At last, some actual linguistics.

The really common "determiners" are this, that, and possessive forms such as their and your.

People often call those last words (your, his) "possessive pronouns", which always confused me because they are obviously not nouns. They are actually "possessive determiners", which is quite logical. The possessive pronouns are mine, ours, etc.

[IAmBroom → bluebarbet]

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[bluebarbet → IAmBroom]

Alas there is none but I can recommend the Lexicon Valley podcast.