We say you say

A leopard can't change its spots

A leopard doesn't change its spots

Dynasties may come and go but a person's nature doesn't change

The habits of three year old lasts until the age of 80

You carry your temper and personality to the grave 

Despite asking my boyfriend to be more punctual, he always turns up for dates late

I don't think that marriage will change Sophia for the better.

Roymond has managed to stop smoking for over a year

Phrase  习语，短语，措辞，

Expression 表达，表现，语句措辞