These sentences have perplexed me about leaving relative pronoun in relative clause. I learn that we can not omit relative pronoun when this pronoun is subject. So why in these two sentences, both pronouns play the role as the subjects, but they all are omitted and changed into -ing clause?
1.We are confident that all the doctors WORKING in the hospital that we represent know that they have acquired the competencies to care for critically ill patients.
- We are aware that the organization has recently circulated a letter to its members PROPOSING to change its name to include our title.
I think "doctors" and "a letter" are subjects so I think there are "who work" and "that propose".
These sentences are written by me. Are they correct if I omit the relative pronouns?
I came across a Twitter WRITTEN by a trainee doctor that share about his way to prepare for the exam.
Here are some of my learning sources INCLUDING math, history and physics which I have collected for a period of time.
Thank you a lot for your help.