expressing opinion :                        

expressing opinion : I think that ... / I belive that ... / I guess that ... / In my opinion ... / To my mind ... /As I see it ... / from my point of view ... / for me ... 

asking for opinion : what do you think about ...? / what is your opinion about ...? / what is your point of view about ...? / what is your attitude towards ...? / how do you feel about ... ?  

agreeing : I agree with you ... / I'm for it ... / I share the same view ... / I'm in favor of it ... / your definitly right...

disagreeing :I disagree with you ... / I dont think so ... / you're wrong ... / I oppose it ... / sorry to sy it ,but ... / I'm against it ...

asking for opinion : what do you think about ...? / what is your opinion about ...? / what is your point of view about ...? / what is your attitude towards ...? / how do you feel about ... ?