whenever

英 /wenˈevə/ 　美 /wenˈevɚ/

conj. 每当；每次Every time that something happens.
conj. 无论何时；随时At any time that something happens or is convenient.
adv. 究竟什么时候Used in questions to express surprise about when something happened.

Whenever I cook soup, my cat waits beside the stove.

每当我煮汤时，我的猫就守在炉子旁边。

Whenever cities expand, planners should consider how new developments will affect existing communities and local wildlife.

每当城市扩张时，规划者都应考虑新开发项目将如何影响现有社区和当地野生动物。

搭配

whenever possible 只要有可能whenever necessary 每当有必要时whenever you like 随你什么时候

引导将来时间从句时，通常用一般现在时，不用will。

when (adv.)