Okay, let's repeat the phrases. I don't think so. I beg to differ. I'm afraid I don't agree. I'm not so sure about that. That's not how I see it.

Not necessarily. Yes, but on the contrary No way. I totally disagree. Great. Now let's test yourself. Your teacher is saying that exams are an important part of learning.

Then you want to politely disagree with him. What do you say? I beg to differ. I'm afraid I don't agree. Your sister says, living in a village is much more healthier than living in a city. And then you want to say that it is not always true.

So what do you say? Not necessarily. If you want to strongly disagree with someone What do you say? I totally disagree. I totally disagree.