1. How can a preposition function as an adjective and a noun? Can you give me some simple examples? -- A prepositional phrase (led by a preposition) can do both: The man under the tree is my father. Under the tree is a nice location for a nap.
2. Can this word 'among' precede the word or words that note two people, not more than two?-- No
I think I saw somewhere in this forum that when you have a preposition that is positioned ahead of all other sentential elements, as in a subject spot, it could very well mean that a "true" subject is somewhere else -- and it could very well be a inverted structure. Do you really think a preposition can function as a subject as you said? I am confused because I think t