doesn't[英] [ˈdʌznt][美] [ˈdʌznt]是don't的单三形式，does的否定式。didn't是它的
过去式。注：does是do的第三形式。
aux. 表示否定.（等于does not）
A politician who doesn't understand arts and humor can only bring a desert to people.
Doesn't is the usual spoken form of 'does not'.
We'll never get there if he doesn't speed up.
It doesn't take much to stir the students to violence.
Whether the bicycle was blue or red, it doesn't matter to Bill.
It doesn't mean to insult others but courses offence sometimes.