The letter a has several different pronunciations, which can make it difficult to learn if their language only has one, like for example, Spanish:

car -//, cat – / /, what – //, play -/e/, and of course the schwa – / / as in a book,

I don’t think there’s much relationship between how letters are said in the alphabet, which is I think what you mean by Is it the indirect article or what?

On the second question, also the question of weak or strong stress: Normal stress – ” a book” (//), but strong stress – “I said a book, not two books!” ” (/ e/). ”

And whether it is a stressed or unstressed syllable in a word, eg: marginal – first a stressed – (/ /), the second unstressed – (/ /)

Mastering English pronunciation is just one of those little joys of learning this particular language!

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