英语文明礼貌的谚语

What goes around comes around.
你给别人什么,返回来别人就会给予你什么.
这启示我们要好好对待别人,做个文明人.

A constant guest is never welcome.
常客令人厌。
''After you'' is good manners.
“您先请”是礼貌。
Cheats never prosper.
骗人发不了财。