That is why I will teach you, in this brief speech, how to express consent and disagreement in English with a complete list of expressions that will allow you to agree with others and disagree. I will also show you some expressions to express your opinion, as this is closely related to how we agree or disagree with others. We may have to express our consent or refusal of an individual`s action or attitude. So, it`s better to do it well! This is another way of saying that you completely agree with someone. We will now take a look at some differences of opinion. In that case, I should tell you that every time we disagree with someone, it might seem pretty rude if we just said, “I don`t agree.” .