Asking attention : Attention please! Guess what! Look!
Checking for understanding : Do you understand? Do you follow me? Are you with me? With me so far?
Asking opinion : "What do you think about.... What's your comment on. ., What's your opinion about. .
Giving opinion : "I think its... In my view... My comment is.. I guess ... I assume.. I suppose... in my opinion...
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