Different way to use polite expressions Polite expressions are used to show respect but do you know there are different ways to use them? Example 1 Imagine a married couple using casual expressions each other. And one day, a wife suddenly starts using polite expressions to her husband. It is not because she wants to show respect, but she must be angry at him or wants to claim there is an emotional gap between them. Example 2 Mr.A and Mr.B are class-mates or co-workers, they are same age or in a same position. They know it's more natural to use casual expressions but somehow, Mr.A uses polite expressions to Mr.B. This means Mr.A doesn't make friends with Mr.B. Like these examples, polite expressions are sometimes used when you don't want close relationship with a person.