a,+an,+some,+any

[|any or some 1] [|any or some 2] [|any or some 3] [|some or any 4]

[|a, an, some, any 1] [|a, an, some, any 2] [|a, an, some, any 3]

[|There is/are with some/any/a/an]

[|countable nouns with some, a, an]