What + A / an + (adjective) + singular countable noun + subject + predicate! "What is the composition of singular countable noun" in a sentence?

What + A / an + (adjective) + singular countable noun + subject + predicate! "What is the composition of singular countable noun" in a sentence?

Singular countable nouns belong to the object in this English fixed sentence pattern. In a few cases, they are predicative
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