Answer:
the sentence is an object of a preposition. is that what you're trying to know?
Myrtle is convinced that Tom truly loves her and will leave his wife for her
It's supposed to be Our neighbors are across the street.
It does not really matter which form you write in. However, writing in the third person omniscient is generally more effective for essays. If you were writing, say, a blog, you would use the first person, but in this case, I think you want to use the third person.
