Please advise on which is the grammatically correct preposition to mean that "you're not useful to me anymore."
"I have no further use of/for you," he said sternly, "so please leave as soon as possible."
Better: You are of no further use to me. You realize that this is very curt and dismissive, don't you?
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Better: You are of no further use to me.
You realize that this is very curt and dismissive, don't you?