Englishfor English speakers
a più non posso
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
non
Prefix
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non or non- means the same as not, but makes not part of the word it changes. When you add non- to a word it makes that word mean the opposite.
That drink is non-alcoholic, it has no alcohol in it.
He is a non-believer; he does not believe at all.