Hello...
When we want to express our agreement to what is said, we can say, "You can say that.".
Then can we say, "You can’t say that." to express disagreement?
Or do we have to say in other ways?
". " to express disagreement? No.
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When we want to express our agreement to what is said, we can say, "You can say that.". No, the expression is "You can say that again!"'
Then can we say, "You can’t say that." to express disagreement? No.
Clive
I think maybe you're asking about conversation fillers and discourse markers to keep a conversation going.
Negative options: