Hello Petite Fleur! I agree with Jamie (except for the last sentence) so I would say that the sentences should be written like this: - "There's no need for another opinion." - "There's no need to change our minds." - "There's no need for you to share opinion, thank you." - this is a more polite way of saying it. I would say that that these sentences are natural and might be used in an official work scenario because to say "There is no need" is more formal than to say "We don't need". I hope that helps!

The most "native" way that I can think of saying these phrases would be: - "There's no need for another opinion." - "There's no need to change our minds." - "There's no need for your opinion." Having said this, I can't think of many situations in which these phrases would sound natural. Depending on the context, you could instead say: - "We/I need no other opinion." - "We/I don't need to change our mind/s." - "We/I didn't ask for your opinion." Hope these help.

Thanks guys, the sentences were just examples. What I wanted to know was about the grammar.

First two sound fine. The third, as J. Luke says is a bit of a harsh feeling to express in which case using 'there's no need of/for your opinion' seems to be be phrased too politely. I'd say you need the more direct, 'no-one is asking for your opinion' or 'we don't need your opinion'. But both are very curt.

I think it's quite rude to tell somebody that you don't need his/her opinion. It is too direct. Instead, just listen to what his/her opinion is and then say, "Thank you for your suggestion/opinion. Let me think about it."