Some note when comminucate with people

Bad words:

 

"why not....", it is bad because it make people think that you are saying they are wrong, and people get unhappy. If someone question your on anything, I think you won't be happy, but if you will be happy if someone can offer you suggestion by asking you a question. So these sentenance could be changed as "Do you think if we could .....?" so don't make the your suggestion or idea sounds like has nothing related with him, but also make him that he made this idea at some respect, and more eaiser to let him accept the idea.