Discussion phrases

Agree with somebody

I think so, too.
You're absolutely right.
I think you're right.
I think that's a good/ important point.

Disagree with somebody

Well, I don't think so.
I wouldn't say so.
I see your point, but...
I know, but...
You don't really mean that, do you?
I can understand that..., but...

Express your opinion

I think...
I would say...
I believe...
I'm sure...
Let me add...
Basically, ...
In my opinion, ...
However, ...
I feel that...
What is most important to me is...
On the one hand, ...
On the other hand, ...
Finally, ...

Ask somebody to explain

I don't quite understand what you mean.
I'm not sure what you mean.
Do you mean that...?
Are you saying that...?
Can you explain what you mean?