Question

What is/are the preposition(s) of the following sentence?: The constant talking from the audience members next to us was very rude and almost ruined the movie.

Answer 1

There are two propositions in the sentence:
1) `"from"`
2) `"to"`

Explanation:

The constant talking `[` `color(red)("from")`  `the  audience  members` `]`
next `[` `color(red) " to"` `us` `]` was very rude and almost ruined the movie.

There are two prepositions in this sentence

1) from
2) to

They each form part of a prepositional phrase with a noun (or a pronoun in the "object" case) as the object of the preposition

1) "`"from the audience members"`" is the entire prepositional phrase,
with the noun "`members`" as the object of the proposition "`"from"`."

2) "`"to us"`" is the entire prepositional phrase,
with the pronoun "`us`" as the object of the preposition "`"to"`".

Here's a list of the 49 prepositions

https://www.tes.com/teaching-resource/5-word-class-learning-mats-6420993