by esledge Sun Nov 30, 2008 4:30 pm
Guest is right, thanks!
You would often see commas around the prepositional phrase:
Her brother, along with her parents, insists that she remain in school.
The commas emphasize Guest's point that her brother is the singular subject of the sentence, though the commas are not the reason we must regard the subject as singular. ONLY "and" makes a plural subject. Any other words (along with, together with, in addition to, etc.) don't do the job.
Emily Sledge
Instructor
ManhattanGMAT