I'm struggling to explain to someone why the following two sentences are both correct:
- "Students, though not necessarily working in the society, are also important members"
- "Students, though not necessarily at work in the society, are also important members"
As I understand it, "working" is a present participle, but what is "at work" best described as? Is it simply a preposition squished together with a verb, or is there a more specific grammatical name for the elements at play???