Examples
zhè这zhāng张piào票sān三rì日yǒu xiào有效。
这张票三日有效。
The ticket holds good for three days.
所以别人的思想方法用在你身上不一定有效。
Therefore, other people's ways of thinking might not be suited to you.
只要制定学习计划，就能有效地取得进步。
If you make a study plan, you can make progress efficiently.