We should act in conformity with the rules. 我们应该依照规定行事。
Pragmatics regards speech performance as primarily a social act ruled by various social conbentions. Some key concepts: reference, force, effect, and cooperative principles. 语用学主要将言语行为看成是被各种社会常规所制约的一种社会行为。主要概念:所指、强制、效果和合作原则。
How do you know he didn't act by the rules? 你怎么知道他没有按规定行事的?
The court is acting in loco parent. 正以家长地位行为的法院。
I can't imagine their acting so rashly. 我不能想象，他们会这样贸然行事。