I've found a few similar questions here, but I'm still not sure in this specific case if there should be a preference for using the word arise or arises:
Originally proposed before BCS theory as a phenomenological (i.e. non-microscopic) description of type-I superconductors, Ginzburg–Landau theory was later shown by Gor’Kov [5] to be derivable within the framework of BCS theory. It is generally applicable to both type-I and -II superconductors close to their critical temperatures, although it is sometimes successfully applied to situations much below this. From it arise two material-specific equations that are important to the superconductor choice in many quantum technologies:
To me, arise feels a bit more natural here since I'm talking about one theory and so I feel this should take a singular verb, although Grammarly seems insistent that this should be arises (presumably due to the object being plural). Could someone please clarify which I should be using and why?
Best Answer
For convenience, the sentence in question (minus some parts that aren't relevant here) is:
The subject of the sentence is "two material-specific equations," which is plural, so the verb, "arise," also needs to be plural (which it is). The sentence is already written correctly, and changing the verb form to "arises" would make it wrong.
The phrase "from it" is merely an argument which is a prepositional phrase. There is no object.