These phrases help to keep the conversation moving: Why? (In what way? Why do you think so?)
Don't you think, though, that ...
I'm not sure what you mean.
Have you got anything to add (to what Nick said)?
Does anybody share Nick's opinion (views)?
Could someone sum up what has been said?
Let's just run through the arguments for and against.
I say... Honestly... If you ask me ... You know what I think ...
The point is ... Don't you agree that...? Tell you what...
Have you heard about...? Do you happen to know that...?
Have you got any idea ...? Someone has told me that...
I hear that... That's what I heard. I'm afraid I don't know much about...
Not that I know of ... I wonder if you remember ... Have I got it right?
Am I right to believe ...? But why should (shouldn't) I? Well I don't (didn't) think ...
But how could I? If I were you ... I wish I could but ... I really couldn't imagine ...
What a silly way to talk! I wish you would ... I'm really sorry but...
I really feel bad about it. What do you think I should have done?