"He is very polite." "He is always courteous." For a man, "he is always such a gentleman." For a woman, "she's a real lady."

Which word can use to describe a person so polite and which behaviours may you think a person is the politest?Thank you so much!

You could simply say that a person is "very polite". Courteous, respectful, or well-mannered can be used, too.

I would say "courteous" most of the time- like :"he is such a courteous person." Well, there could be more, but I would say this is the most direct method. Simple and easy~

I don't understand your question :/ What do you want to know?