SOME TIPS AS TO HOW TO AGREE & DISAGREE WITH AN OPINION:
A. How to Agree Strongly with an Opinion.
1. I couldn't agree more!
2. That's absolutely true!
3. Absolutely!
4. I agree with your point.
5. I'd go along with you there.
6. I'm with you on that.
7. That's just what I was thinking.
8. That's exactly what I think.
9. That's a good point.
10. That's just how I see it.
11. That's exactly my opinion.
B. How to Half Agree with an Opinion.
1. Yes, perhaps, however ...
2. Well, yes, but ...
3. Yes, in a way, however ...
4. Hmm, possibly, but ...
5. Yes, I agree up to a point, however ...
6. Well, you have a point there, but ...
7. There's something there, I suppose, however.
8. I guess you could be right, but ...
9. Yes, I suppose so, however ...
10. That's worth thinking about, but ...
C. How to Disagree Politely with an Opinion.
1. I am not so sure.
2. Do you think so?
3. Well, it depends.
4. I'm not so certain.
5. Well, I don't know.
6. Well, I'm not so sure about that.
7. Hmm, I'm not sure you're right.
8. I'm inclined to disagree with that.
9. No, I don't think so.
D. How to Disagree Strongly with an Opinion.
1. I disagree.
2. I disagree with your idea.
3. I'm afraid I don't agree.
4. I'm afraid your idea is wrong.
5. I can't agree with you.
6. I couldn't accept that for a minute.
7. You can't actually mean that.
8. I wouldn't go along with you there.
9. You can't be serious about that.
10. You must be joking.
11. It's possible you are mistaken about that.
Note - You need to be very polite when disagreeing with someone... even someone you know quite well. With someone you know very well, you can disagree more directly.