syflysun1 Wrote:their being overworked = Object,
here, we use "being" to emphasis that the object is present or that the object is passive, or both?
"being" is required here because this is a passive-voice construction. the nurses are being overworked (by their employers). they are the recipient, not the agent, of the action; the agent is unimportant in the sentence. the only way to express this sort of idea, without unnecessarily diverting attention toward the agent, is to use the passive voice.
at this point, then, it's simply proper grammatical construction.
* we require a gerund here, since "protest" takes an object with a noun form (gerunds act as nouns).
* this gerund must be "being", since it's in the passive voice.
so there's no matter of "emphasis" here; it's a simple matter of right vs. wrong.
hope that helps.