The first question: "Can 'that' be acting both as relative pronoun and subordinating conjunction in this sentence: "The negotiators ultimately worked out a peace treaty that was accepted by the warring countries"? Let's begin with what a relative pronoun is. It's a function word that introduces a dependent (or relative) clause and connects it to the independent or main clause. A relative clause actually works as an adjective, providing more details about its antecedent noun. This definitely makes it a relative pronoun and not a "that" doubling up as a subordinating conjunction.

Source: Manila Times December 02, 2021 04:50 UTC